MULTIMODAL TRAFFIC IMPACT ANALYSIS · 3/14/2019 · 1. Reviewed proposed development plans,...

1900 FORT MYER DRIVE MULTIMODAL TRAFFIC IMPACT ANALYSIS

March 14, 2019

www.WellsAndAssociates.com

@WellsAssoc @WellsandAssociates Wells + Associates

1900 Fort Myer Drive Multimodal Traffic Impact Analysis

Arlington County, Virginia

March 14, 2019

Prepared by:

Wells + Associates

Michael J. Workosky, PTP, TOPS, TSOS Michael R. Pinkoske, PTP

John A. Schick

703‐917‐6620


March 14, 2019

TABLE OF CONTENTS PAGE SECTION 1: INTRODUCTION _________________________________________________ 1 STUDY SCOPE ........................................................................................................................... 1 SECTION 2: BACKGROUND INFORMATION ___________________________________ 6 EXISTING TRANSPORTATION FACILITIES .................................................................................. 6 ROADWAY NETWORK ............................................................................................................... 6 N. Nash Street .............................................................................................................. 6 N. Fort Myer Drive/N. Lynn Street ............................................................................... 6 Key Boulevard .............................................................................................................. 6 Lee Highway (US 29) .................................................................................................... 6 Jefferson Davis Highway (US 110) ................................................................................ 6 George Washington Memorial Parkway ...................................................................... 6 Interstate‐66 ................................................................................................................ 7 ON STREET PARKING ................................................................................................................. 9 GENERAL LAND USE PLAN (GLUP) ........................................................................................... 9 ROSSLYN SECTOR PLAN (REALIZE ROSSLYN) .......................................................................... 10 EXISTING SITE ACCESS AND DESCRIPTION .............................................................................. 18 N. Nash Street/Site Driveway (North) ........................................................................ 18 N. Nash Street/Site Driveway (South) ......................................................................... 18 N. Fort Myer Drive/Site Driveway .............................................................................. 18 SECTION 3: MULTIMODAL TRANSPORTATION FACILITIES ____________________ 19 OVERVIEW .............................................................................................................................. 19 CENSUS DAT MODE‐SHARE INFORMATION ........................................................................... 19 EXISTING TRANSIT SERVICES ................................................................................................... 19 Metrorail Service ........................................................................................................ 19 Bus Service ................................................................................................................. 19 PEDESTRIAN FACILITIES .......................................................................................................... 27 CAR SHARING SERVICES ......................................................................................................... 28 BICYCLE FACILITIES .................................................................................................................. 28 SECTION 4: EXISTING CONDITIONS _________________________________________ 34 EXISTING TRAFFIC COUNTS .................................................................................................... 34 EXISTING CONDITIONS OPERATIONAL ANALYSIS .................................................................. 38 Levels of Service ......................................................................................................... 38 Queueing .................................................................................................................... 38 SECTION 5: FUTURE CONDITIONS WITHOUT DEVELOPMENT (2023) __________ 42 METHODOLOGY/ASSUMPTIONS ............................................................................................ 42 PIPELINE DEVELOPMENTS ...................................................................................................... 42 REGIONAL GROWTH .............................................................................................................. 42


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PLANNED IMPROVEMENTS .................................................................................................... 43 FUTURE CONDITIONS WITHOUT DEVELOPMENT OPERATIONAL ANALYSIS (2023) ............... 50 Levels of Service ......................................................................................................... 50 Queueing .................................................................................................................... 50 SECTION 6: PROPOSED SITE DESCRIPTION, TRIP GENERATION, DISTRIBUTIONS & ASSIGNMENTS ___________________________________________________ 53 PROPOSED SITE REDEVELOPMENT DESCRIPTION ................................................................. 53 PROPOSED SITE ACCESS AND CIRCULATION .......................................................................... 53 LOADING AND SERVICE OPERATION ...................................................................................... 54 SITE TRIP GENERATION ANALYSIS .......................................................................................... 56 SITE TRIP DISTRIBUTION AND ASSIGNMENT ......................................................................... 58 SECTION 7: FUTURE CONDITIONS WITH DEVELOPMENT (2023) ______________ 62 FUTURE TRAFFIC FORECASTS WITH DEVELOPMENT (2023) ................................................... 62 OPERATIONAL ANALYSIS OF FUTURE CONDITIONS WITH THE PROPOSED DEVELOPMENT . 65 Levels of Service ......................................................................................................... 65 Queueing .................................................................................................................... 66 POTENTIAL SIGNAL TIMING IMPROVEMENTS ........................................................................ 66 SECTION 8: CONCLUSIONS AND RECOMMENDATIONS ______________________ 69


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LIST OF FIGURES FIGURE TITLE PAGE 1‐1 Site Location ........................................................................................................... 4 1‐2 Site Plan................................................................................................................... 5 2‐1 Existing (2018) Lane Use and Traffic Control ......................................................... 8 2‐2 On‐Street Parking Restrictions ............................................................................. 11 2‐3 On‐Street Parking Locations ................................................................................ 13 2‐4 GLUP Map ............................................................................................................ 14 2‐5 Rosslyn Sector Plan – Roadway Improvements ................................................... 15 2‐6 Rosslyn Sector Plan – Planned Pedestrian Network ............................................ 16 2‐7 Rosslyn Sector Plan – Planned Bicycle Facilities .................................................. 17 3‐1 Multimodal Facilities ............................................................................................ 22 3‐2 Bus Routes ............................................................................................................ 23 3‐3 Pedestrian Infrastructure ..................................................................................... 30 3‐4 Arlington County Bicycle Facilities Map ............................................................... 32 4‐1 Existing (2018) Peak Hour Traffic Counts ............................................................. 35 4‐2 Existing (2018) Peak Hour Pedestrian Counts ...................................................... 36 4‐3 Existing (2018 Peak Hour Bicycle Counts ............................................................. 37 5‐1 Pipeline Development Locations ......................................................................... 44 5‐2 Combined Peak Hour Pipeline Development Traffic Forecasts ........................... 45 5‐3 Regional Growth (2018‐2022) .............................................................................. 47 5‐4 Future Peak Hour Traffic Forecasts without Development (2023) ...................... 48 5‐5 Future Lane Use and Traffic Controls without Development (2023) .................. 49 6‐1 Site Access & Circulation Exhibit .......................................................................... 55 6‐2 Existing Site Trips Removed ................................................................................. 59 6‐3 Hotel Site Generated Trips ................................................................................... 60 6‐4 Residential Site Generated Trips .......................................................................... 61 7‐1 Future Peak Hour Traffic Forecasts with Development ....................................... 63 7‐2 Future Lane Use and Traffic Controls with Development (2023) ......................... 64


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LIST OF TABLES TABLE TITLE PAGE 2‐1 Observed Parking Occupancy .............................................................................. 12 3‐1 Neighborhood Modal Split ................................................................................... 24 3‐2 Bus Stop Summary ............................................................................................... 25 3‐3 Bus Ridership in the Vicinity ................................................................................ 26 3‐4 Sidewalk Width Summary .................................................................................... 31 3‐5 Capital Bikeshare Ridership ................................................................................. 33 4‐1 Existing Conditions Intersection Level of Service Summary ................................ 40 4‐2 Existing Conditions Intersection Queueing Summary ......................................... 41 5‐1 Pipeline Trip Generation Analysis ........................................................................ 46 5‐2 Future Conditions without Development Intersection Level of Service Summary ....................................................................................................................... 51 5‐3 Future Conditions without Development Intersection Queuing Summary ........ 52 6‐1 Trip Generation Analysis ...................................................................................... 57 7‐1 Future Conditions with Development Intersection Level of Service Summary ... 67 7‐2 Future Conditions with Development Intersection Queueing Summary ............ 68


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LIST OF APPENDICES APPENDIX TITLE A Scoping Agreement

B Parking Occupancy

C Multimodal Information

D Existing Count Worksheets

E LOS Descriptions

F Existing Conditions Synchro Worksheets

G Individual Pipeline Trips

H Future Conditions without Development Synchro Worksheets

I Future Conditions with Development Synchro Worksheets


March 14, 2019

1900 Fort Myer Drive

SECTION 1 INTRODUCTION

This report provides an update to address comments received from Arlington County DES staff. Individual responses are contained under a separate cover. The primary updates to this report relate to the changes in site plan layout and revised densities.

This report presents the results of a Multimodal Traffic Impact Analysis for the proposed redevelopment of 1900 Fort Myer Drive, located in Arlington County, Virginia. As shown in Figure 1-1, the subject site is comprised of one block, bounded by N. Nash Street to the west, LeeHighway eastbound to the north, N. Fort Myer Drive to the east, and Turnberry Tower to thesouth.

The Applicant proposes to raze the existing 307 room hotel and parking garage and redevelop the site with a new building consisting of approximately 339 hotel rooms with 36,810 S.F. of conference/event space, 490 residential dwelling units, a 10,613 S.F. ground-level hotel restaurant, and 3,142 S.F. of civic space. To implement the proposed redevelopment, the Applicant is seeking a rezoning application and a major site plan application for the above-referenced Property. With this application, the Application proposes to rezone two existing C-O parcels to C-O Rosslyn. It is noted that for purposes of this study and to provide a conservative analysis the restaurant (10,613 SF) and civic space (3,142 SF) were assumed as retail.

As proposed, a single building with two (2) towers would be constructed. The west tower would house the residential uses of the site while the east contains the hotel and retail uses. Parking for the proposed site would be via an above and below-grade parking structure. Separate parking levels are proposed for the residential and hotel. The site would be served by four (4) vehicular access points; two (2) along N. Nash Street and two (2) on N. Fort Myer Drive. The proposed access points along N. Nash Street are proposed to serve the residential uses and building loading while the access points along N. Fort Drive would serve the hotel/retail uses. A porta coshere would serve the hotel from N. Fort Myer Drive. A copy of the rendered site plan is shown in Figure 1-2.

The current zoning designation for the site is C-O (Commercial Office Building, Hotel, and Multiple Family Residential). The subject parcel is designated as High Density Residential on the Arlington County General Land Use Plan (GLUP).

Study Scope

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A scoping meeting was held with Arlington County staff on April 26, 2018 and identified 12 study intersections for inclusion in the traffic study. The approved scoping document also identified the parameters of the multimodal traffic study and analysis methods, and is included in Appendix A. For purposes of this study, the buildout year was assumed to be 2023.

Tasks undertaken in this study include the following:

1. Reviewed proposed development plans, recently completed traffic impact studies in thevicinity, and other background data.

2. Completed a field reconnaissance of existing roadway and intersection geometries, trafficcontrols, speed limits, and adjacent on-street parking restrictions.

3. Conducted a comprehensive multimodal analysis of the site including transit, walkability,and bicycle facilities. The study determined what options, other than vehicular, areavailable to all users of the site. The study includes bus ridership information, metroridership information, bike-sharing facilities, and pedestrian infrastructure inventory.

4. Established a study scope and specific analysis parameters for the TIA with ArlingtonCounty Department of Environmental Services (DES) staff (see Appendix A).

5. Collected vehicular, pedestrian, and bicycle counts at the study intersections during theweekday AM and PM peak periods.

6. Collected on-street parking information on a typical weekday in the vicinity of the site.

7. Conducted operational analyses of existing levels of service (LOS) and vehicle queues atthe study intersections based on the existing peak hour traffic volumes, the existingintersection geometries, and traffic controls.

8. Forecasted future traffic volumes for the year 2023 without the proposed developmentbased on existing traffic volumes with the addition of regional traffic growth andapproved pipeline developments.

9. Analyzed 2023 future LOS and queues without the proposed development at the studyintersections based on the future forecasts without development, the future intersectiongeometries, and traffic controls.

10. Estimated the number of peak hour trips that would be generated by the buildout of theproposed development based on standard Institute of Transportation Engineers (ITE) TripGeneration Manual, 10th Edition rates and equations.

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11. Prepared future traffic forecasts for study year 2023 with the proposed developmentbased on background traffic volumes and traffic associated with the proposeddevelopment.

12. Analyzed year 2023 future levels of service and vehicle queues with the proposeddevelopment at the study intersections and site driveways, based on the future trafficforecasts and future intersection geometries and traffic controls.

13. Identified traffic improvements/enhancements necessary to mitigate future forecasts asa result of the proposed development for 2023 conditions, if required.

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Figure 1-1Site Location

1900 North Fort Myer DriveArlington County, Virginia

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Figure 1-2Site Plan


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SECTION 2 BACKGROUND INFORMATION

Existing Transportation Facilities

Roadway Network. Vehicular access to/from the existing Holiday Inn site is provided via two (2) curb cuts along N. Nash Street and one (1) along N. Fort Myer Drive. Regional access to/from the site is provided via Lee Highway (US 29), Interstate 66, Jefferson Davis Highway, and the George Washington Memorial Parkway. Local access to the site is provided via Key Boulevard, N. 19th Street, N. Nash Street, N. Fort Myer Drive/N. Lynn Street. Existing lane use and traffic controls at the key study intersections are shown on Figure 2-1. A description of each roadway in the vicinity of the site is provided below along with estimated vehicles per day (VPD) based on published VDOT data, where available.

N. Nash Street is classified as a Major Collector with a speed limit of 25 miles per hour (mph). N.Nash Street provides a north-south connection between Lee Highway to the north and KeyBoulevard to the south. Primary access points for the site are located along N. Nash Street.

N. Fort Myer Drive/N. Lynn Street is classified as a Minor Arterial with a posted speed limit of 25miles per hour (mph) in the vicinity of the site. N. Fort Myer Drive and N. Lynn Street each serveone-way traffic and act as the major north-south route through Rosslyn. These roadways providea connection to the George Washington Memorial Parkway and Francis Scott Key Bridge to thenorth and Arlington Boulevard (US Route 50) to the south. Primary access points for the site arelocated along N. Fort Myer Drive.

Key Boulevard is classified as a local street with a posted speed limit of 25 miles per hour (mph). Key Boulevard provides a local east-west connection through the neighborhood of Rosslyn between N. Quinn Street and N. Nash Street.

Lee Highway (US 29) is classified as a Principal Arterial with a posted speed limit of 30 miles per hour (mph) in the vicinity of the site. Lee Highway is a major east-west connection through northern Arlington County, spanning from Rosslyn to the east, extending through Falls Church, and continuing into Fairfax County.

Jefferson Davis Highway (US 110) is classified as an Principle Arterial with a posted speed limit of 45 miles per hour (mph). Jefferson Davis Highway is a major north-south connection that provides a route between the City of Alexandria and Arlington County.

George Washington Memorial Parkway is classified as an Freeway or Expressway with a posted speed limit of 40 miles per hour (mph). The George Washington Memorial Parkway is a major north-south connection through Arlington County, spanning from Mount Vernon in the south to Capital Beltway (I-495) to the north. This roadway provides access to/from Reagan National Airport.

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Interstate-66 is classified as an Interstate with a posted speed limit of 55 miles per hour (mph). Interstate-66 is a major east-west connection throughout northern Virginia and connecting to Interstate-81 to the west and terminating in Washington DC to the east. Interstate 66 has always restricted to HOV 2+ only during peak periods in the peak direction inside the beltway. Recent upgrades have installed tolling systems to permit single occupancy vehicles to pay a flexible toll and use the roadway during peak periods.

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Figure 2-1Existing (2018) Lane Use and Traffic Controls


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On Street Parking

On-street parking exists on some streets within Rosslyn. Adjacent to the site, on-street parking is provided on both sides of N. Nash Street and a small segment along the N. Fort Myer Drive frontage. No on-street parking is provided along Lee Highway. Varying parking restrictions exist for the on-street parking nearby the site. Figure 2-2 summarizes the on-street parking restrictions for the segments of roadways within close proximity to the site.

Parking occupancy counts were collected where on-street parking is permitted within close proximity to the site on April 11, 2018. The peak overall on-street parking occupancy occurred at 10:00 AM when 71% of the parking spaces were occupied. The observed occupancy is summarized on Table 2-1 and detailed in Appendix B. Refer to figure 2-3 for a map depicting on-street parking locations, contained in the appendix is a map depicting the segments.

General Land Use Plan (GLUP)

The General Land Use Plan (GLUP) is an element of Arlington County’s Comprehensive Plan and is the primary policy guide for future development within the County. The GLUP is used to establish the overall character, extent and location of various land uses. It serves as a guide to communicate the policy of the County Board to citizens, the business community, developers and others in the development of Arlington County.

The site specifically falls into the Rosslyn Coordinated Redevelopment District. The County Board established this district in 1996. The purpose of this district is to encourage the physical and economic development of the Rosslyn area to maximize Rosslyn’s potential, to become a competitive first class urban center which exemplifies superior architecture and excellent urban design. The plan provides a set of vision goals and recommendations that include the following:

A diverse mix of workplaces, housing, retail, and visitor destinations; A physical environment with an emphasis on walkability and the public realm; A “Peaks and Valleys” approach to building heights that protects priority view corridors,

supports an appealing environment at the ground level, creates an attractive, distinctiveskyline with varied heights, and ensures sensitive transitions to surroundingneighborhoods.

A diverse network of public parks and open spaces that engage the Potomac waterfront,provide active outdoor recreational opportunities and amenities for all ages and lifestyles,and provide opportunities for informal congregation, reflection, and meditation; and

A transformed transportation network, including an enhanced system of complete streets,improvements to transit facilities and operations,

As mentioned previously, the site is identified as high-density residential on the plan. The proposed redevelopment is consistent with the goals established in the GLUP. Refer to Figure 2-4 for a detailed map of the Arlington County GLUP in Rosslyn.

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Rosslyn Sector Plan (Realize Rosslyn)

A two-year community planning effort involving a diverse group of residents, property owners, and business representatives, Realize Rosslyn culminated in a comprehensive vision and plan to transform this economic hub of the County into a more walkable, dynamic, live-work-shop-play urban center and vibrant gateway to Arlington. On July 23, 2015, the County Board unanimously voted to adopt the Rosslyn Sector Plan. The plan acts as a guide for future development and includes recommendations for certain parks and transportation related elements.

The plan describes four (4) transportation goals within Rosslyn, as follows:

1. Transform Rosslyn’s street system into an enhanced grid of complete streets.2. Enhance transit facilities, operations and connections serving Rosslyn, and make it one of

the premier transit hubs in the region.3. Transform the pedestrian and bicycle network into a safer, more attractive and more

accessible place to walk and bike.4. Coordinate and manage the most effective and efficient performance of Rosslyn’s

transportation network to support the area’s future growth.

Specific transportation improvements noted in the plan include the conversion of Fort Myer Drive and Lynn Street from one-way to two-way, removal of the Fort Myer Drive tunnel, wider sidewalks, and enhancement of bicycle facilities within the core. The plan also includes the extension of 18th Street from it’s current terminus at Oak Street to extend to Arlington Ridge Road as a primary pedestrian way.

The redevelopment of the site is consistent with the Sector Plan recommendations related to right-of-way, streetscape, and the orientation of land uses. Additionally, the proposal includes an east-west pedestrian connection trough the site which is consistent with the Plan.

Figures 2-5 through 2-7 show the recommended vehicular circulation, pedestrian facilities, and bicycle facilities from the Rosslyn Sector Plan, respectively.

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Figure 2-2On-Street Parking Restrictions


No ParkingMetered Parking (2 Hours)Handicap Metered Parking (2 Hours)

No RestrictionsTour Bus Parking Only

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Table 2‐1 A1900 Fort Myer DriveObserved Parking Occupancy1

Occupied % Occupied Occupied % Occupied Occupied % Occupied Occupied % Occupied Occupied % OccupiedWednesday April 11th 2018

6:00 AM 3 14% 8 57% 1 33% 0 0% 6 86%7:00 AM 1 5% 10 71% 1 33% 2 33% 5 71%8:00 AM 2 10% 11 79% 2 67% 1 17% 5 71%9:00 AM 4 19% 10 71% 2 67% 2 33% 6 86%10:00 AM 10 48% 12 86% 2 67% 2 33% 6 86%4:00 PM 4 19% 9 64% 3 100% 0 0% 5 71%5:00 PM 5 24% 8 57% 2 67% 0 0% 5 71%6:00 PM 9 43% 9 64% 3 100% 0 0% 5 71%7:00 PM 11 52% 9 64% 3 100% 0 0% 5 71%

Notes:1. Based on counts collected by Wells + Associates on Wednesday, April 11, 2018.2. Number of available spaces estimated based on field counts and measurements assuming 22 feet per space.

Table 2‐1 B1900 Fort Myer DriveObserved Parking Occupancy1

Occupied % Occupied Occupied % Occupied Occupied % Occupied Occupied % Occupied Occupied Total % OccupiedWednesday April 11th 2018

6:00 AM 4 80% 2 29% 4 40% 2 67% 30 39%7:00 AM 5 100% 3 43% 5 50% 3 100% 35 46%8:00 AM 5 100% 4 57% 6 60% 3 100% 39 51%9:00 AM 5 100% 6 86% 5 50% 3 100% 44 58%10:00 AM 5 100% 6 86% 8 80% 3 100% 54 71%4:00 PM 4 80% 2 29% 5 50% 3 100% 35 46%5:00 PM 5 100% 3 43% 7 70% 2 67% 37 49%6:00 PM 5 100% 4 57% 9 90% 2 67% 46 61%7:00 PM 5 100% 6 86% 9 90% 2 67% 51 67%

Notes:1. Based on counts collected by Wells + Associates on Wednesday, April 11, 2018.2. Number of available spaces estimated based on field counts and measurements assuming 22 feet per space.

Time

Segment AN. Nash Street (West Side)

Between Lee Highway EB & Key Blvd21 Available Spaces2

Segment DN. Fort Myer Dr. (East Side)

Between Lee Highway EB & Key Blvd14 Available Spaces2

Segment CN. Fort Myer Dr. (West Side)

Between Lee HW EB & 19th St. N3 Available Spaces2

Time

Between Lee HW EB & 19th St. N6 Available Spaces2

Segment EKey Boulevard (North Side)

Between N Oak St & 19th St. N7 Available Spaces2

Segment BN. Nash Street (East Side)

Key Boulevard (South Side) N. Oak Street (West Side) N. Oak Street (East Side) N. Nash St (West Side)Overall

Segment F Segment G Segment H Segment I Total

7 Available Spaces2 10 Available Spaces2 3 Available Spaces2 76 Available Spaces 2Between N Oak St & 19th St. N Between Key Blvd & 18th St. N Between Key Blvd & 18th St. N Between Key Blvd & Wilson Blvd

5 Available Spaces2


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Figure 2-3On-Street Parking Locations


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Figure 2-4GLUP Map


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Figure 2-5Rosslyn Sector Plan - Roadway Improvements


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Figure 2-6Rosslyn Sector Plan - Planned Pedestrian Network


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Figure 2-7Rosslyn Sector Plan - Planned Bicycle Facilities


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Existing Site Access and Description

As mentioned previously, the existing Holiday Inn located at 1900 Fort Myer Drive is served by three (3) curb cuts; two (2) on N. Nash Street and one (1) on N. Fort Myer Drive. A detailed summary of the existing site access points is described below.

N. Nash Street/Site Driveway (North) This site driveway is located at an unsignalized, full-movement intersection approximately 130 feet south of EB Lee Highway and is adjacent fromsite driveway serving the Georgetown Vista condominium complex on the west side of N. NashStreet. This site driveway serves the drop-off/pick-up loop on the north side of the existingHoliday Inn hotel. This driveway also facilitates loading for the site.

N. Nash Street/Site Driveway (South). This site driveway is located approximately 180 feet southof the north N. Nash Street site driveway. It serves full-movement access to the Holiday Innparking garage and operates under stop-controlled conditions.

N. Fort Myer Drive/Site Driveway. This site driveway is located approximately 220 feet south ofEB Lee Highway and provides access to the hotel drop-off/pick-up loop and the parking garage.This driveway operates under right-in/right-out conditions due to the one-way traffic pattern onN. Fort Myer Drive.

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SECTION 3 MULTIMODAL TRANSPORTATION FACILITIES

Overview

The subject site is served by multiple public transportation options including regional bus service; the Washington Metropolitan Area Transit Authority (WMATA) Metrorail system; a connected network of sidewalks and pedestrian crosswalks; car-sharing systems; bike-sharing systems; and on-street and trail bicycle facilities. The subject site is located in the neighborhood of Rosslyn within Arlington County. This neighborhood consists of high density mixed use with a strong emphasis on non-auto mode share alternatives and complete street initiatives.

Census Data Mode-Share Information

U.S. Census Data based on the 2011-2015 American Community Survey for census tracts surrounding the site were analyzed to understand travel patterns exhibited by local residents. A total of two (2) census tracts were selected due to their proximity to the site. The average survey results of the selected census tracts indicate that 34% of commuters travel by vehicle, 49% by transit, 11% walk, 3% bike/other, and 2% work from home. Refer to Table 3-1 for a summary and Appendix C for detailed census mode-share information.

Existing Transit Services

Metrorail Service. The closest Metrorail Station is located approximately .25 miles from the subject site. The Rosslyn Metrorail Station, provides access to the Orange, Blue, and Silver lines. The Orange Line runs between New Carrolton and Vienna, the Blue Line between Franconia-Springfield and Largo Town Center and the Silver Line between Largo Town Center and Wiehle-Reston East. Future expansions (anticipated 2020) of the Silver Line will extend service to Loudoun County and Washington Dulles International Airport. Riders can use three (3) lines serving Rosslyn to Metro Center and L’Enfant Plaza for access to the Red, Green, and Yellow lines.

The WMATA Metrorail system operates seven (7) days a week from 5:00 AM to 11:30 PM on weekdays, 8:00 AM to 1:00 AM on Saturdays, and 8:00 AM to 11:00 PM on Sundays. The train headways at the Rosslyn Station range from 6 minutes during peak periods to 12-20 minutes during off-peak periods and weekends.

The Rosslyn Metrorail Station served an average daily ridership of approximately 13,195 passengers in 2016 according to the publication Metrorail Hourly Ridership by Station (Arlington County, May 2010). Refer to Appendix C for hourly Metrorail ridership and annual average passenger boarding’s at the Rosslyn station, respectively.

Bus Service. The 1900 Fort Myer Drive site and nearby area is served by numerous bus routes operated by Arlington Rapid Transit (ART) and WMATA. Below are summaries of the routes that operate in close proximity to the site.

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March 14, 2019

ART Route 43 (Wilson Boulevard – Fort Myer Drive) has stops located approximately .15 miles or three (3) minutes south of the site. This route runs between the Court House Metrorail Station, through the Rosslyn Metrorail Station, and down to the Crystal City Metrorail Station. This bus line operates weekdays, Saturdays, and Sundays with approximately 10 minute headways.

ART Route 45 (N Moore St – Wilson Boulevard) ) has stops located approximately .15 miles or three (3) minutes south of the site. This route starts at Columbia Pike, and runs to Courthouse Metrorail station, and the Rosslyn Metrorail Station. This bus line runs operates on weekdays, Saturdays, and Sundays with approximately 25 minute headways during peak periods.

ART Route 55 (N Moore St – Wilson Boulevard) has stops located approximately .15 miles south of the site along N. Moore Street. This route runs between the Rosslyn Metrorail Station and the East Falls Church Metrorail Station along Lee Highway (Route 29). The bus line operates on weekdays, Saturdays, and Sundays with 15 minute headways during peak periods.

ART Route 61 (N Moore St – Wilson Boulevard) has stops located approximately .15 miles south of the site along N. Moore Street. This route runs between the Rosslyn Metrorail Station and the Court House Metrorail Station along Wilson Boulevard. The bus line operates Monday to Friday with 25 minute headways during peak periods.

WMATA Metrobus 3Y (Lee Highway – Fort Myer Drive) serves the site and is located along Lee Highway. This route runs between the East Falls Church Metrorail Station and the McPherson Square Metrorail Station along Lee Highway eventually merging onto Interstate 66 and crossing the Theodore Roosevelt Memorial Bridge into Washington DC. The bus line operates on weekdays with service only during peak periods and has headways varying from 15 to 30 minutes.

WMATA Metro Bus 4B (Rosslyn Metrorail Station) has stops located approximately .15 miles south of the site along N. Moore Street. The route runs between the Rosslyn Metrorail Station and the Courthouse Metrorail Station, continues south down to Arlington Boulevard into Fairfax County and ending at Seven Corners Transit Center. The bus line operates on weekdays, Saturdays, and Sundays with 15 minute headways during peak periods.

WMATA Metro Bus 38B (Rosslyn Metrorail Station) has stops located approximately .15 miles south of the site along N. Moore Street. The route runs between the Farragut North Station Metrorail Station near the White House, Farragut West Station Metrorail Station, Foggy Bottom-GWU Metrorail Station, continues south over the Key Bridge to the Rosslyn Metrorail Station, Courthouse Metrorail Station, Clarendon Metrorail Station, Virginia Square-GMU Metrorail Station, and ends at the Ballston-MU Metrorail Station.

Refer to Figure 3-1 for the locations of bus stops nearby the site and Figure 3-2 for bus routes. Bus stops in the vicinity of the site are detailed in Table 3-2. Specific information for the above listed routes is located in Appendix C.

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March 14, 2019

Average weekday boarding and alighting data was provided by DES staff for eight (8) bus stops nearby the site. Ridership data for these stops are summarized in Table 3-3 with the locations identified on Figure 3-1.

21

ROSSLYNMETRO STATION

66


N FO

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N LYN

N STREET

17TH STREET N

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET

SITE

CLARENDON

BOULEVARD


19TH STREET NN

OAK STREET N

NAS

H ST

REET

15070 15069

15068

15100

15119 15118

45010

FRAN

CIS

SCOT

TKE

Y BR

IDGE

GEORGE WASHINGTON

MEMORIAL PARKWAY

WILSON BOULEVARD

NORTH

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Figure 3-1Multimodal Facilites


BUS STOP

METRO STATION

ZIPCAR

METRORAIL BLUE LINE

METRORAIL ORANGE LINE

METRORAIL SILVER LINE

22

NORTH


Figure 3-2Bus Routes


SITE

23

Table 3-11900 Fort Myer DriveNeighborhood Modal Split

Note(s):1. Based on 2012-2016 American Community Survey 5-Year Estimate Data from the U.S. Census Bureau.

Average

34%

49%

11%

3%

2%

Transit 42%56%

Auto 27% 42%

Mode Census Tract 1016.03 Census Tract 1017.02

Worked at Home 1% 4%

Bike/Other 3% 2%

Walk 13% 10%


March 14, 2019

24

Table 3‐21900 Fort Myer DriveBus Stop Summary 1

15067

15068

15069

15070

15100

15118

15119

45010

Note(s):1. Information provided by Arlington County Department of Environmental Services staff, ART, WMATA, Google Earth, and field observations.

WMATA 38B, WAMATA 4B, ART 45

Sign, Information Case, Shelter with Seating, Overhead Street Lighting, Acceptable Sidewalk Width, Trash Receptacle

Clarendon Blvd, EB @ N Ode Street

ART 45, ART 55, ART 61AB, WMATA 4B

Sign, Information Case, Shelter with Seating, Acceptable Sidewalk Width, Overhead Street Lighting, Trash Receptacle

ART 43Sign, Information Case, No Shelter with Seating, Overhead Street Lighting,

Acceptable Sidewalk Width, No Trash ReceptacleWilson Blvd, EB @ Fort Myer Drive

Wilson Blvd, WB @ N Moore Street

WMATA 3Y, ART 55Sign, Information Case, No Shelter with Seating, Overhead Street Lighting,

Acceptable Sidewalk Width, No Trash Receptacles

WMATA 38B, WMATA 4B, ART 45

Sign, Information Case, No Shelter with Seating, Overhead Street Lighting, Acceptable Sidewalk Width, No Trash Receptacle


Acceptable Sidewalk Width, No Trash Receptacle



Stop ID Bus Routes Served Condition



Location

Lee Highway, EB @ N Quinn Street FS

Lee Highway, EB @ Fort Myer Drive N

Lee Highway, WB @ N Nash Street MB

Lee Highway, WB @ N Oak Street NS

N Nash Street, NB @ Wilson Blvd


March 14, 2019

25

Table 3‐31900 Fort Myer DriveBus Ridership in the Vicinity 1

Boarding Alighting Boarding Alighting Boarding Alighting Boarding AlightingAverage Weekday Ridership15067 0 8 1 8 0 7 1 815068 2 22 1 27 4 26 3 2615069 1 49 57 1 48 2 36 1815070 1 0 0 0 0 0 1 115100 1 42 3 52 0 39 2 4515118 216 38 24 249 38 243 93 17715119 23 238 241 33 230 41 166 10545010 42 2 6 50 3 38 18 31

Note(s):1. Data provided by Arlington County Department of Environmental Services staff.

CLARENDON BLVD EB @ N ODE STREETWILSON BLVD EB @ FORT MYER DRIVE

May Average

WILSON BLVD WB @ N MOORE STREET

Bus Stop ID

LocationMarch April

LEE HWY EB @ N QUINN STREET FSLEE HWY EB @ FORT MYER DRIVE NLEE HWY WB @ N NASH STREET MBLEE HWY WB @ N OAK STREET NSN NASH STREET NB @ WILSON BLVD


March 14, 2019

26


March 14, 2019

Pedestrian Facilities. A majority of the streets in Rosslyn provide sidewalks on both sides of the street and marked crosswalks at signalized intersections. A connected grid of pedestrian infrastructure exists, with the exception of a missing crosswalk at the WB Lee Highway/N. Nash Street intersection. The site frontages along N. Nash Street, N. Fort Myer Drive, and Lee Highway all have sidewalks that are in good condition. Below provides a summary of the pedestrian infrastructure in place at each of the study intersections. 1. N. Nash Street/Lee Highway (WB). The signalized intersection of N. Nash Street/Lee Highway (WB) has pedestrian countdown heads and ramps serving each crosswalk. This intersection is missing a marked east-west crosswalk and ramps but has countdown heads serving this movement. 2. N. Fort Myer Drive/Lee Highway (WB). The signalized intersection of N. Fort Myer Drive/Lee Highway (WB) has marked crosswalks, pedestrian countdown heads, and ramps serving each crosswalk on all four (4) legs of the intersection. 3. N. Lynn Street/Lee Highway (WB). The signalized intersection of N. Lynn Street/Lee Highway (WB) has marked crosswalks, pedestrian countdown heads, and ramps serving each crosswalk on all four (4) legs of the intersection. 4. N. Nash Street/Lee Highway (EB). The signalized intersection of N. Lynn Street/Lee Highway (WB) has marked crosswalks, pedestrian countdown heads, and ramps serving each crosswalk on all four (4) legs of the intersection. 5. N. Fort Myer Drive/Lee Highway (EB). The signalized intersection of N. Lynn Street/Lee Highway (WB) has marked crosswalks, pedestrian countdown heads, and ramps serving each crosswalk on all four (4) legs of the intersection including the eastbound channelized right-turn. 6. N. Lynn Street/Lee Highway (EB). The signalized intersection of N. Lynn Street/Lee Highway (WB) has marked crosswalks on three (3) legs of the intersection, pedestrian countdown heads, and ramps serving each crosswalk. The north leg of the intersection is missing a marked crosswalk and pedestrian infrastructure. 10. N. Fort Myer Drive/19th Street N. The signalized intersection of N. Fort Myer Drive/19th Street N. has marked crosswalks, pedestrian countdown heads, and ramps serving each crosswalk on all four (4) legs of the intersection including the eastbound channelized right-turn. 11. N. Nash Street/Key Boulevard. The unsignalized intersection of N. Nash Street/Key Boulevard contains a single marked crosswalk and ramps on the north leg of the intersection. 12. Key Boulevard/19th Street. The unsignalized intersection of Key Boulevard/19th Street has a marked crosswalk and ramps serving the only crosswalk at the intersection on the west leg.

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March 14, 2019

Figure 3-3 shows the pedestrian facilities within the vicinity of the site and central Rosslyn. Table 3-4 provides a sidewalk width summary adjacent to the site for both the existing and future withdevelopment conditions.

In order to provide an assessment of the site’s access to pedestrian facilities and nearby amenities, the Walk Score was calculated for the site is included in Appendix C. The Walk Score is an analysis provided by the website and provides scores from 0 (worst) to 100 (best) for walkability. Based on its location, the subject site received a score of 89 which is classified as “Very Walkable – Most errands can be accomplished on foot.” Further, walk score provides a transit score of 78 which is classified as “Excellent Transit – Transit is convenient for most trips” and a bike score of 74 implying that the site is “Very Bikeable – Some hills, excellent bike lanes”.

The combination of sidewalks in good repair, marked crosswalks at the intersections around the site, installation of ramps to serve the crosswalks, on-street parking, and planting buffers enhance the pedestrian experience around the site and encourage alternative modes of transportation.

It is noted that pedestrian improvements were installed by Arlington County at the nearby intersections of Lee Highway/Fort Myer Drive and Fort Myer Drive/19th Street in conjunction with the Rosslyn Street enhancement public engagement workshops. These included restriping for better lane delineation, creation of pedestrian and bicycle refuge areas, and enhanced striping for improved pedestrian visibility.

Car Sharing Services. There is currently one car sharing service, Zipcar, with a total of four locations within a ½ mile radius of the site. The first location is south of the site in an on-street parking spot at the intersection of N. Oak Street and Clarendon Boulevard. To the west of the site at the intersection of North Quinn Street and Wilson Boulevard there is an on-street Zipcar location. The next two (2) Zipcar locations are located within garages with the closest garage south of the site in the Sedona Slate Garage and a second located to the east of the site in the 1100 Wilson Boulevard Garage. Refer to Figure 3-1 for Zipcar locations.

Bicycle Facilities. According to the 2017 Arlington County Bike Map, N. Fort Myer Street is identified as an on-street bike route. A network of on-street and off-street trails exist around the site providing connections throughout northern Arlington County. Refer to Figure 3-4 for the Arlington County Bicycle Facilities Map. As shown, the combination of on-street routes, dedicated bike lanes, off-street trails, nearby Bikeshare, and the on-site bicycle facilities create a bicycle friendly environment and encourage use as a non-auto mode.

Capital Bikeshare is an automated bicycle rental or bicycle sharing program that provides over 3,400 bicycles at 440 stations across Washington, DC, Maryland, and Virginia. Membership, which is required to use Capital Bikeshare, includes five (5) options for joining: 24 hours ($8), three days ($17), 30 days ($28), one year ($85), or one year with monthly installments ($96, $8/month for 12 months). The first 30 minutes of use are free; users then are charged a usage

28


March 14, 2019

fee for each additional 30-minute period. Bicycles can be returned to any station with an available dock.

Within a ½ mile radius of the site there are five (5) Capital Bikeshare stations, as shown on Figure 3-4, with the closet one located approximately two (2) blocks east of the site at the intersectionof N. Lynn Street and 19th Street North. There are a total of 31 docks available at this location.Data provided by Capital Bikeshare indicates that the station was installed in April, 2011 and hada peak ridership rate of 3,961 total trips during the summer months. Ridership data for all stationslocated within the ½ mile radius is summarized in Table 3-5.

In addition to bikeshare, electric-assist scooter sharing services have become readily available throughout the Rosslyn-Ballston Corridor. Users must have an account with the scooter service provider and can then board a scooter wherever available. When the user is done with their trip, the scooter is left for the next rider.

29

SITE

LEE HIGHWAY

N FO

RT MYER

DRIVE

N LYN

N STREET

N M

OO

RE S

TREE

T

N N

ASH STREET

ARLINGTONGATEWAY PARK

ARLINGTONGATEWAY PARK

KEYBOULEVARD

NORTH

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Figure 3-3Pedestrian Infrastructure


SIDEWALKPEDESTRIAN CROSSWALKELEVATED PEDESTRIAN WALKWAYSTRAILSIGNALIZED INTERSECTION

1 23

65

4

8

7

9

13

1211

10

30

Table 3‐41900 Fort Myer DriveSidewalk Width Summary 1

Note(s):1. Based on Google Earth and field observation.

138

Proposed Sidewalk Width (feet)

10108813151512

Lee Highway EB (South Side) 6

N Fort Myer Dr (East Side) 12Lee Highway EB (North Side) 13

19th Street ( South Side) 15N Fort Myer Dr (West Side) 15

Lee Highway EB to 19th Street NN Nash St to N Fort Myer DrN Nash St to N Fort Myer Dr

Key Boulevard (South Side) 819th Street ( North Side) 13

N Oak St to 19th St. NN Fort Myer Dr to Key BlvdN Fort Myer Dr to Key Blvd

Lee Highway EB to 19th Street N

N. Nash Street (East Side) 10Key Boulevard (North Side) 8

Street NameExisting Sidewalk Width

(feet)

N. Nash Street (West Side) 10 Lee Highway EB to Key Blvd Lee Highway EB to Key Blvd

N Oak St to 19th St. N

Section


March 14, 2019

31

NORTH


Figure 3-4Arlington County Bicycle Facilites Map


SITE

32

Table 3‐51900 Fort Myer Drive Capital Bikeshare Ridership1

2017‐July 1620 2211 38312017‐August 1700 2261 39612017‐September 1125 1515 26402017‐October 1474 2124 35982017‐November 945 1434 23792017‐December 572 903 14752018‐January 550 852 14022018‐Feburary 674 1048 17222018‐March 774 1219 19932018‐April 1180 1739 29192018‐May 1542 2111 36532018‐June 1457 2055 3512




2017‐July 317 236 5532017‐August 295 193 4882017‐September 196 148 3442017‐October 355 251 6062017‐November 229 126 3552017‐December 151 85 2362018‐January 151 103 2542018‐Feburary 173 111 2842018‐March 163 81 2442018‐April 200 134 3342018‐May 250 171 4212018‐June 282 175 457Note(s):1. Data provided by Capital Bikeshare.

Station 31093: 21st St N & N Pierce St

Station 31027: Key Blvd & N Quinn St

Month Origin Destination Total Trips

Station 31014: Lynn St & 19th St N

Station 31015: Rosslyn Metro/Wilson Blvd & Ft Myer Dr

Station 31917: N Lynn St & Fairfax Dr


March 14, 2019

33


March 14, 2019

SECTION 4 EXISTING CONDITIONS Existing Traffic Counts Existing vehicular, pedestrian, and bicycle traffic counts were conducted by Wells + Associates on Wednesday, April 11, 2018 from 6:00 to 10:00 AM and 4:00 to 7:00 PM at the following study intersections, per the scoping agreement.

1. WB Lee Highway/N. Nash Street 2. WB Lee Highway/N. Fort Myer Drive 3. WB Lee Highway/ N. Lynn Street 4. EB Lee Highway/ N. Nash Street 5. EB Lee Highway/N. Fort Myer Drive 6. EB Lee Highway/N. Lynn Street 7. N. Nash Street/North Site Driveway 8. N. Nash Street/South Site Driveway 9. N. Fort Myer Drive/Site Driveway 10. N Fort Myer Drive/19th Street N. 11. Key Boulevard/N. Nash Street 12. Key Boulevard/19th Street N.

The AM and PM peak hour vehicular, pedestrian, and bicycle traffic counts are summarized on Figures 4-1 through 4-3, respectively. Detailed sheets containing the count data are included in Appendix D. Based on a review of traffic count data, the common peak hour of the adjacent road network around the site was identified as 7:30 AM to 8:30 AM and from 4:45 PM to 5:45 PM. Traffic volumes at each study intersections were reviewed and balanced up, if needed, to 100 percent of the adjacent intersection if no driveways or intersections exist in between. A review of the vehicular count data indicates that the link of N. Nash Street, adjacent to the site, currently carries approximately 232 AM peak hour trips and 226 PM peak hour trips. The link of N. Fort Myer Drive, adjacent to the site, currently carries approximately 1,057 AM peak hour trips and 1,169 PM peak hour trips. The link of Lee Highway eastbound, adjacent to the site, carries 2,236 AM peak hour trips and 1,126 PM peak hour trips. A review of the pedestrian volumes indicates that the maximum number of pedestrian crossings at the study intersections occurs at the 19th Street N./N. Fort Myer Drive intersection where a total of 680 AM crossings were observed and 756 PM crossings were observed. This location is the closest study intersection to the metro station and the Rosslyn core and would be expected to facilitate a large volume of pedestrians.

34

66


N FO

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N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

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RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5139

2 3

6

10

11 12


19TH STREET N

N O

AK STREET N N

ASH

STRE

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NORTH


Figure 4-1Existing (2018) Peak Hour Traffic Counts


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

DRIVEWAY

GASSTATION

6/37/36

11/9446/95338/43

42/6010/31

242/305939/1494

206/604106/125

425/339181/431

2306/1818131/298

25/3278/90

115/9135/40

57/632040/945

17/51

683/917362/702

374/2521862/874

93/1951608/1440

1129/1052829/676

1/573/80

8/10

10/270/00/1

6/4134/1030/1

0/10/06/1

70/813/1

0/10/1

3/1140/107

18/111039/1158

22/21204/146639/924224/112

105/23796/190

117/100226/243

32/5240/25

51/69105/257

196/12379/40

104/214202/158

3/11

11/140/31/0

4/3192/21752/109

93/343/2

140/112

35

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

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N N

ASHSTREET

SITE

1

4

7

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5139

2 3

6

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11 12


19TH STREET N

N O

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ASH

STRE

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NORTH


Figure 4-2Existing (2018) Peak Hour Pedestrian Counts


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

DRIVEWAY

GASSTATION

159/111

0/0

119/59

48/75

31/39167/123

33/15

25/83

24/3328/42

104/2262/10

14/16

2/10

15/30

35/24

167/43112/154

123/67

31/31

44/53

126/218

4/11

16/25

0/0

0/0

250/290

51/13670/111

309/21947/74

166/257

25/70

278/170 279/252

181/384 33/66

437/288 201/302 20/36

0/0 0/0 680/756 47/74 191/327

36

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

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RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5139

2 3

6

10

11 12


19TH STREET N

N O

AK STREET N N

ASH

STRE

ET

NORTH


Figure 4-3Existing (2018) Peak Hour Bicycle Counts


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

DRIVEWAY

GASSTATION

0/81/14

0/033/1350/0

0/00/0

15/1425/12

9/905/1

1/35/89

10/140/0

3/40/0

2/33/1

0/02/10/0

22/130/0

1/02/2

0/015/45

1/01/2

0/18/50/0

0/00/00/0

0/04/50/0

0/00/00/0

0/00/0

0/00/0

0/00/0

0/00/0

0/011/2017/13

6/4

1/10/0

0/00/2

3/41/0

0/12/2

3/40/4

1/74/20/0

0/00/00/0

0/00/31/0

1/10/01/1

AM PEAK HOURPM PEAK HOUR

000 / 000

37


March 14, 2019

Existing Conditions Operational Analysis

The existing peak hour levels of service (LOS) and queues were estimated at the study intersections based on; the existing lane use and traffic controls shown on Figure 2-1; existing traffic signal phasing/timings obtained from Arlington County; the existing vehicular, pedestrian, and bicycle traffic counts shown on Figures 4-1 through 4-3; and the Highway Capacity Manual (HCM) 2000 methodologies, using Synchro Software, version 10.

Descriptions of LOS “A” through “F” for signalized and unsignalized intersections are included in Appendix E. The results of the existing conditions analysis are presented in Appendix F and summarized in Tables 4-1 and 4-2. In addition to the peak hour volumes the following inputs were coded into Synchro: calculated peak hour factors by approach, lane widths, speed limits, adjacent parking lane, number parking maneuvers, and bus blockages.

Levels of Service. As shown in Table 4-1 the seven (7) signalized study intersections currently operate at overall acceptable LOS “D” or better during the AM and PM peak hours. It is acknowledged that the closely spaced intersections along Lee Highway and Nash Street experience queuing during the peak hours that limit the ability of vehicles to traverse the intersection. Thus, the reported level of service may not fully represent actual conditions.

At the stop-controlled intersections, all lane groups currently operate at acceptable LOS “D” or better during the AM and PM peak hours with the exception of the eastbound left-turn movement at the Key Boulevard/19th Street N. (LOS “F”, AM and PM peaks). As observed in the field, left turning vehicles from Key Boulevard to 19th Street N. utilize gaps in traffic created by traffic signals up and downstream to enter the main line traffic stream. Operations at this intersection are further complicated by the number of pedestrian movements and adjacent driveways that serve the service station and church on the east side of 19th Street N. Further, the limited green time allocated to the 19th Street N. approach at Fort Myer Drive impacts queuing and operations in this area. These queues and delays impact southbound traffic on Nash Street during peak periods.

Queueing. Existing peak hour queues for study intersection were determined using the 50th and 95th percentile queues estimated by Synchro Software, version 10. The 50th and 95th percentile queues of existing conditions are used to establish a datum against which to compare future conditions. The 50th percentile (or average) queue is defined as the maximum back of queue associated with a typical signal cycle. The 95th percentile queue is defined as the maximum back of queue with 95th percentile traffic volumes. The 95th percentile queue is not necessarily ever observed, it is simply based on statistical calculations1. The results of the queueing analysis are presented in Appendix F and summarized in Table 4-2.

As shown on Table 4-2 and observed in the field, peak hour queuing and the calculated average queues can be accommodated within the available turn lane storage provided at study

1 Synchro Studio 9, Traffic Signal Software – User Guide

38


March 14, 2019

intersections. It is noted that limited turn lane storage bays exist in the area. Most turns are made from shared through lanes.

Additionally, vehicular queueing is not fully realized due to the closely spaced intersections in Rosslyn and metered conditions. Queuing, beyond what is shown in the Synchro reports, is likely upstream and downstream as vehicles enter and exit the Rosslyn street grid.

39

Table 4‐11900 N. Fort Myer Drive

LOS Delay (s) LOS Delay (s)1. N. Nash Street & Lee Highway (WB) ‐ SignalizedWBL C 26.7 C 26.1

WBTR C 30.3 C 32.7

NBLT A 3.9 B 15.7

SBTR A 6.3 B 10.7

Overall C 27.2 C 30.22. N. Fort Myer Drive & Lee Highway (WB) ‐ Signalized 3

WBL C 23.1 C 22.9

WBT C 24.3 C 30.1

SBTR A 8.1 B 14.6

Overall B 11.7 B 18.73. N. Lynn Street & Lee Highway (WB)‐ SignalizedWBT C 34.1 C 29.5

WBR D 38.7 D 35.1

NBL A 0.6 A 2.5

NBT A 7.5 A 8.2

Overall B 12.9 B 13.74. N. Nash Street & Lee Highway (EB) ‐ SignalizedEBLTR C 24.1 C 26.8

NBTR C 28.7 B 12.4

SBL C 28.4 B 12.3

SBT C 24.2 B 10.7

Overall C 24.5 C 23.75.N. Fort Myer Drive & Lee Highway (EB) ‐ Signalized 3

EBTR C 27.6 B 11.6

SBL D 45.2 C 32.7

SBT C 33.5 C 29.4

Overall C 30.4 C 22.36. N. Lynn Street & Lee Highway (EB) ‐ Signalized 3

EBL B 13.9 B 17.9

EBT B 12.2 B 16.0

NBT D 38.4 C 26.6

NBR C 23.2 C 25.8

Overall C 23.7 C 21.57. N. Nash Street & North Site Driveway ‐ UnsignalizedEBLTR B 10.6 A 9.9

WBLTR A 9.3 A 9.3

NBLTR A 0.0 A 0.1

SBLTR A 0.8 A 0.88. N. Nash Street & South Site Driveway ‐ UnsignalizedWBLR A 0.0 A 9.2

NBTR A 0.0 A 0.0

SBLTR A 0.4 A 0.19. N. Fort Myer Drive & South Site Driveway ‐ UnsignalizedEBR A 9.0 A 8.9

SBTR A 0.0 A 0.010. N. Fort Myer Drive & 19th Street N. ‐ SignalizedEBTR C 24.7 C 24.2

WBLT C 24.4 C 29.7

SBL B 17.0 B 13.5

SBTR B 13.9 B 16.0

Overall B 18.2 C 20.411. N. Nash Street & Key Boulevard ‐ UnsignalizedEBLT A 2.8 A 2.5

WBTR A 0.0 A 0.0

SBLR B 13.5 B 13.812. Key Boulevard & 19th Street ‐ UnsignalizedEBL F 61.9 F 256.2

EBR B 13.3 B 13.5

WBLTR B 10.6 C 18.0

NBLTR A 2.7 A 5.5

SBLT A 0.2 A 0.6

SBR A 0.0 A 0.0

Note(s):1. Capacity analysis based on Highway Capacity Manual 2000 methodology, using Synchro 10.2. "Err" denotes a delay that Synchro is unable to report.

Existing Conditions Intersection Level of Service Summary 1, 2

Approach/ Lane GroupExisting Conditions (2018)

AM Peak Hour PM Peak Hour


March 14, 2019

40

1900 N. Fort Myer Drive

50th Pecentile 95th Pecentile 50th Pecentile 95th Pecentile

1. N. Nash Street & Lee Highway (WB) ‐ Signalized

WBL 145 21 47 22 m31

WBTR ‐ 104 134 211 234

NBLT ‐ 7 m12 41 81

SBTR ‐ 2 8 11 32

WBL ‐ 33 64 52 95

WBT ‐ 64 95 175 223

SBTR ‐ 109 140 267 343

3. N. Lynn Street & Lee Highway (WB)‐ Signalized

WBT ‐ 118 155 156 179

WBR ‐ 109 182 119 183

NBL ‐ 0 m0 1 m15

NBT ‐ 88 m410 88 356

4. N. Nash Street & Lee Highway (EB) ‐ Signalized

EBLTR ‐ 409 #502 195 213

NBTR ‐ 78 130 24 62

SBL ‐ 46 87 37 68

SBT ‐ 14 35 13 31

5.N. Fort Myer Drive & Lee Highway (EB) ‐ Signalized

EBTR ‐ ~166 m#613 45 75

SBL ‐ 170 #302 269 379

SBT ‐ 184 229 285 337

6. N. Lynn Street & Lee Highway (EB) ‐ Signalized

EBL ‐ 129 m132 179 261

EBT ‐ 139 m140 192 251

NBT ‐ 261 #337 221 266

NBR ‐ 22 60 67 140

7. N. Nash Street & North Site Driveway ‐ Unsignalized

EBLTR ‐ ‐ 1 ‐ 0

WBLTR ‐ ‐ 1 ‐ 3

NBLTR ‐ ‐ 0 ‐ 0

SBLTR ‐ ‐ 0 ‐ 1

8. N. Nash Street & South Site Driveway ‐ Unsignalized

WBLR ‐ ‐ 0 ‐ 0

NBTR ‐ ‐ 0 ‐ 0

SBLTR ‐ ‐ 0 ‐ 0

9. N. Fort Myer Drive & South Site Driveway ‐ Unsignalized

EBR ‐ ‐ 2 ‐ 2

SBTR ‐ ‐ 0 ‐ 0

10. N. Fort Myer Drive & 19th Street N. ‐ Signalized

EBTR ‐ 72 105 87 117

WBLT ‐ 55 84 131 174

SBL ‐ 84 148 38 81

SBTR ‐ 97 127 152 215

11. N. Nash Street & Key Boulevard ‐ Unsignalized

EBLT ‐ ‐ 6 ‐ 4

WBTR ‐ ‐ 0 ‐ 0

SBLR ‐ ‐ 15 ‐ 16

12. Key Boulevard & 19th Street ‐ Unsignalized

EBLT ‐ ‐ 136 ‐ 229

EBR ‐ ‐ 19 ‐ 7

WBLTR ‐ ‐ 2 ‐ 5

NBLRT ‐ ‐ 6 ‐ 17

SBLT ‐ ‐ 0 ‐ 1

SBL ‐ ‐ 0 ‐ 0

Note(s):1. ~ Volume exceeds capacity, queue is theoretically infinite.2. # 95th percentile volume exceeds capacity, queue may be longer.3. m Volume for 95th percentile queue is metered by upstream signal.4. "Err" denotes a delay that Synchro is unable to report.

2. N. Fort Myer Drive & Lee Highway (WB) ‐ Signalized

Table 4‐2

Existing Conditions Intersection Queuing Summary 1, 2, 3, 4

Approach/ Lane Group

Storage Length(ft)

Existing Conditions (2018)



March 14, 2019

41


March 14, 2019

SECTION 5 FUTURE CONDITIONS WITHOUT DEVELOPMENT (2023)

Background Conditions

This section presents an analysis of the future transportation conditions including projections of 2023 future traffic forecasts without the proposed development, as well as capacity and queuing analyses under this condition.

Methodology/Assumptions. It was assumed that the proposed redevelopment would be constructed and fully occupied by 2023, as specified in the traffic scoping document. The 2023 future traffic forecasts without site redevelopment were developed based on a composite of existing baseline 2018 traffic volumes, trips generated by nearby pipeline developments, and regional traffic growth.

Pipeline Developments. As outlined in the scoping document, there were four (4) pipeline developments identified near the site. The following provides a list of the included pipelines and Figure 5-1 shows the location of each development.

1401 Wilson Boulevard and 1400 Key Boulevard – 40,000 SF Grocery; 288 DU Residential Central Place – 570,549 SF Office; 11,054 SF Retail 1812 North Moore Street – 569,739 Office; 11,020 SF Retail 1411 Key Boulevard – 67 Condominiums, 6 Townhomes

Table 5-1 shows the trips expected to be generated by each individual development. The pipeline development trips were assigned to the roadway network using distributions provided in their traffic studies. The total pipeline development trips are shown on Figure 5-2 and detailed in Appendix G, and total 1,231 AM peak hour trips, 1,576 PM peak hour trips, and 17,664 daily trips.

It is noted that there are additional approved developments in Rosslyn, including Rosslyn Plaza and Rosslyn Gateway, but were not included in the study since they are not anticipated to be constructed by 2023.

Regional Growth. An increase in traffic associated with regional growth from 2018 to 2023 was estimated at 0.5 percent per year, compounded annually, for all turning movements as agreed to with DES staff during scoping. This growth rate was applied to all turning movements, with the exception of the movements in/out of the site driveways. This growth accounts for increases in traffic resulting from potential development and influences outside of the immediate study area. The regional growth at each of the study intersections is shown on Figure 5-3.

The resulting 2023 future traffic forecasts without development are shown on Figure 5-4.

42


March 14, 2019

Planned Improvements. A single roadway improvement was identified within the study area. The Lynn Street Esplanade and Custis Trail Improvements were assumed to be complete by 2023. This County improvement project would eliminate a westbound lane on Lee Highway (west of the Key Bridge) and allow for an expanded trail. The resulting lane use and traffic controls for future conditions without development is shown on Figure 5-5.

43

23

1

66


N FO

RT MYER DRIVE

N LYN

N STREET

17TH STREET N

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET4

SITE

CLARENDON

BOULEVARD


19TH STREET N

N O

AK STREET N N

ASH

STRE

ET

FRAN

CIS

SKE

Y BR

ID

TONARKWAY

WILSON BOULEVARD

NORTH

O:\

PRO

JECT

S\70

01 -

7500

\748

7 HO

LIDA

Y IN

N R

OSS

LYN

AT

KEY

BRID

GE\G

RAPH

ICS\

7487

- GR

APHI

CS.D

WG

Figure 5-1Pipeline Development Locations


1. 1401 WILSON BOULEVARD2. CENTRAL PLACE3. 1812 NORTH MOORE STREET4. 1411 KEY BOULEVARD

44

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

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RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5139

2 3

6

10

11 12


19TH STREET N

N O

AK STREET N N

ASH

STRE

ET

NORTH


Figure 5-2Combined Peak Hour Pipeline Development Traffic Forecasts


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

DRIVEWAY

GASSTATION

0/00/0

0/044/25624/50

0/044/60

10/2288/42

58/28478/22

0/092/50

41/12144/256

24/500/0

25/3044/60

34/67232/64

0/0

166/640/0

116/32141/62

22/9871/360

10/1215/18

0/058/117

0/0

0/00/00/0

0/069/900/0

0/00/00/0

58/1170/0

0/00/0

0/069/90

0/0282/96

0/010/20

194/5478/22

0/00/0

39/1121/30

57/944/17

21/674/127

53/10442/85

10/171/30/0

0/00/00/0

0/046/1385/116

43/930/0

14/28


000 / 000

45

Table 5‐11900 N. Fort Myer DrivePipeline Trip Generation Analysis 1, 2

WeekdayDaily

In Out Total In Out Total Traffic

Existing UsesOffice 710 195,472 SF 139 23 162 29 141 170 1,700 Total Existing Trips 139 23 162 29 141 170 1,700

Approved UsesGrocery 850 40,000 SF 126 112 238 219 219 438 6,182 Residential 222 288 DU 7 54 61 38 16 54 582 Total Approved Uses 133 166 299 257 235 492 6,764

Net New Trips (6) 143 137 228 94 322 5,064

Approved UsesOffice 710 570,549 SF 372 60 432 82 400 482 4,820 Retail 820 11,054 SF 15 12 27 26 28 54 540 Total Approved Trips 387 72 459 108 428 536 5,360

Approved UsesOffice 710 569,739 SF 372 60 432 82 399 481 4,810 Retail 820 11,020 SF 15 12 27 26 28 54 540 Total Approved Trips 387 72 459 108 427 535 5,350

Approved UsesCondominiums 221 67 DU 2 11 13 9 3 12 174 Townhomes 221 6 DU 0 1 1 1 0 1 16 Total Approved Trips 2 12 14 10 3 13 190

Total Approved Pipeline Trips 909 322 1,231 482 1,094 1,576 17,664 Notes:1. Trip Generation based on the Institute of Transportation Engineers' (ITE) Trip Generation Manual, 10th Edition. 2. All development programs taken from approved plans.

Summary

2. Central Place

3. 1812 North Moore Street

4. 1411 Key Boulevard

Weekday AM Peak Hour Weekday PM Peak HourPeak Hour of Adjacent Street Peak Hour of Adjacent Street

1. 1401 Wilson Boulevard & 1400 Key Boulevard

Land Use ITE Code Size Unit


March 14, 2019

46

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

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RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5139

2 3

6

10

11 12


19TH STREET N

N O

AK STREET N N

ASH

STRE

ET

NORTH


Figure 5-3Regional Growth (2018-2023)


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

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SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

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STREET N.

N. FO

RTM

YER

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N. FO

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YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

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DRIVEWAY

GASSTATION

0/00/0

0/011/241/1

0/00/1

6/824/38

5/153/3

11/95/11

58/463/8

1/12/2

3/21/1

1/251/24

0/1

17/239/18

9/647/22

2/541/36

28/2721/17

0/02/20/0

0/00/00/0

0/03/30/0

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16/236/3

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000 / 000

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5139

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19TH STREET N

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Figure 5-4Future Peak Hour Traffic Forecasts Without Development (2023)


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

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RTM

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DRIVE

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HIGHWAY(WESTBOUND)

N. LYN

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STREET

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NLEE

HIGHWAY(WESTBOUND)

STREET

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LEE

HIGHWAY(EASTBOUND)

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ASH

STREET

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STREET

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N. FO

RTM

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YER

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HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

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LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

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STREET

7

DRIVEWAY

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ASH

STREET

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ASH

NORTHSITE

STREET

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GASSTATION

6/37/36

11/9501/123363/94

42/6054/92

258/3351051/1574

269/903187/150

436/348278/492

2405/1985178/562

50/8380/92

143/12380/101

92/1322323/1033

17/52

866/1004371/720

499/2902050/958

117/2981720/1836

1167/1091865/711

1/5133/199

8/10

10/270/00/1

6/4206/1960/1

0/10/06/1

130/2003/1

0/10/1

3/1213/200

18/111347/1283

22/21219/170

849/1001308/137

108/24398/195

159/114253/279

90/14745/43

73/77182/390

254/230123/126

117/236208/165

3/11

11/140/31/0

4/3243/235138/228

138/1283/2

158/143


000 / 000

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5139

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19TH STREET N

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Figure 5-5Future Lane Use and Traffic Controls without Development (2023)


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

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HIGHWAY(WESTBOUND)

N. FO

RTM

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DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

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LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

DRIVEWAY

GASSTATION

STOP Stop Sign

Signalized Intersection

Represents One Travel Lane

Lane Improvement/Reduction by Others

49


March 14, 2019

Future Conditions without Development Operational Analysis (2023)

Future peak hour LOS and 50th and 95th percentile queues without the redevelopment of 1900 Fort Myer Drive in year 2023 were estimated at the study intersections based on the future conditions without development lane use and traffic controls shown on Figure 5-5; existing traffic signal phasing/timings obtained from Arlington County; the future peak hour traffic forecasts without redevelopment are shown on Figure 5-4; and the HCM 2000 methodologies using Synchro Software, version 10. The LOS and queue results are presented in Appendix H and summarized in Tables 5-2 and 5-3.

Levels of Service. As shown in Table 5-2, with increases in traffic due to regional growth and pipeline developments, the signalized study intersections would continue to operate at acceptable overall levels of service (LOS “D” or better) during the AM and PM peak hours with the exception of the N. Fort Myer Drive/Lee Highway EB during the AM peak hour which would degrade to an LOS “E”. The results indicate only minor increases in delay would occur.

As noted under the existing conditions, it is acknowledged that the closely spaced intersections along Lee Highway and N. Nash Street experience queuing during the peak hours that limit the ability of vehicles to traverse the intersections. Thus, the reported level of service may not fully represent actual conditions.

Each stop controlled study intersection would continue operate similar to existing conditions. Consistent with existing conditions, the lane groups mentioned previously would continue to operate at LOS “E” or “F”. This includes the critical turning movements at the Key Boulevard/19th Street N. and Nash Street/Key Boulevard intersections as described under existing conditions.

Queueing. As shown on Table 5-3, the results of the queueing analysis are similar to those described in under existing conditions. Increases in the estimated average and 95th percentile queues when compared to existing conditions equate to approximately two (2) vehicles or less.

Metered conditions due to the closely spaced intersections would continue to exist under the future conditions without redevelopment. This limits vehicles from entering and exiting the Rosslyn street grid, thus causing vehicle queuing upstream and downstream.

50


LOS Delay (s) LOS Delay (s) LOS Delay (s) LOS Delay (s)1. N. Nash Street & Lee Highway (WB) ‐ SignalizedWBL C 26.7 C 26.1 C 27.0 C 22.2

WBTR C 30.3 C 32.7 C 33.7 D 35.2

NBLT A 3.9 B 15.7 A 2.5 C 24.2

SBTR A 6.3 B 10.7 A 7.3 B 19.9

Overall C 27.2 C 30.2 C 28.2 C 32.92. N. Fort Myer Drive & Lee Highway (WB) ‐ Signalized 3

WBL C 23.1 C 22.9 C 22.2 C 25.0

WBT C 24.3 C 30.1 C 23.5 E 58.1

SBTR A 8.1 B 14.6 A 8.9 B 19.1

Overall B 11.7 B 18.7 B 12.6 C 31.33. N. Lynn Street & Lee Highway (WB)‐ SignalizedWBT C 34.1 C 29.5 C 34.8 C 29.0

WBR D 38.7 D 35.1 C 35.0 D 35.6

NBL A 0.6 A 2.5 A 0.3 A 8.3

NBT A 7.5 A 8.2 A 9.1 A 8.0

Overall B 12.9 B 13.7 B 14.3 B 13.74. N. Nash Street & Lee Highway (EB) ‐ SignalizedEBLTR C 24.1 C 26.8 D 51.5 C 24.2

NBTR C 28.7 B 12.4 C 33.1 B 17.0

SBL C 28.4 B 12.3 C 29.9 B 15.6

SBT C 24.2 B 10.7 C 25.1 B 13.8

Overall C 24.5 C 23.7 D 48.9 C 22.15.N. Fort Myer Drive & Lee Highway (EB) ‐ Signalized 3

EBTR C 27.6 B 11.6 F 91.4 B 16.7

SBL D 45.2 C 32.7 E 59.9 C 32.9

SBT C 33.5 C 29.4 D 35.6 C 29.7

Overall C 30.4 C 22.3 E 75.0 C 24.56. N. Lynn Street & Lee Highway (EB) ‐ Signalized 3

EBL B 13.9 B 17.9 B 10.5 B 18.4

EBT B 12.2 B 16.0 B 10.4 B 16.4

NBT D 38.4 C 26.6 D 47.6 D 38.5

NBR C 23.2 C 25.8 C 24.3 D 41.7

Overall C 23.7 C 21.5 C 26.9 C 29.07. N. Nash Street & North Site Driveway ‐ UnsignalizedEBLTR B 10.6 A 9.9 B 11.8 B 11.4

WBLTR A 9.3 A 9.3 A 9.7 A 10.0

NBLTR A 0.0 A 0.1 A 0.0 A 0.0

SBLTR A 0.8 A 0.8 A 0.5 A 0.48. N. Nash Street & South Site Driveway ‐ UnsignalizedWBLR A 0.0 A 9.2 A 0.0 B 10.3

NBTR A 0.0 A 0.0 A 0.0 A 0.0

SBLTR A 0.4 A 0.1 A 0.2 A 0.09. N. Fort Myer Drive & South Site Driveway ‐ UnsignalizedEBR A 9.0 A 8.9 A 9.2 A 9.1

SBTR A 0.0 A 0.0 A 0.0 A 0.010. N. Fort Myer Drive & 19th Street N. ‐ SignalizedEBTR C 24.7 C 24.2 C 25.5 C 24.6

WBLT C 24.4 C 29.7 C 24.4 C 30.4

SBL B 17.0 B 13.5 C 21.6 B 14.3

SBTR B 13.9 B 16.0 B 15.0 B 16.9

Overall B 18.2 C 20.4 B 19.3 C 20.911. N. Nash Street & Key Boulevard ‐ UnsignalizedEBLT A 2.8 A 2.5 A 3.5 A 4.5

WBTR A 0.0 A 0.0 A 0.0 A 0.0

SBLR B 13.5 B 13.8 C 16.0 D 26.812. Key Boulevard & 19th Street ‐ UnsignalizedEBL F 61.9 F 256.2 F 214.3 F 886.0

EBR B 13.3 B 13.5 B 14.0 C 15.9

WBLTR B 10.6 C 18.0 B 12.1 C 22.7

NBLTR A 2.7 A 5.5 A 5.1 A 9.5

SBLT A 0.2 A 0.6 A 0.1 A 0.6

SBR A 0.0 A 0.0 A 0.0 A 0.0


Future Conditions without Development Intersection Level of Service Summary 1, 2

Approach/ Lane GroupFuture Conditions without Development (2023)Existing Conditions (2018)

PM Peak HourAM Peak Hour PM Peak Hour AM Peak Hour


March 14, 2019

51


50th Pecentile 95th Pecentile 50th Pecentile 95th Pecentile 50th Pecentile 95th Pecentile 50th Pecentile 95th Pecentile


WBL 145 21 47 22 m31 33 64 45 m49

WBTR ‐ 104 134 211 234 168 212 400 m403

NBLT ‐ 7 m12 41 81 7 m13 81 145

SBTR ‐ 2 8 11 32 2 11 15 39

WBL ‐ 33 64 52 95 80 141 57 m109

WBT ‐ 64 95 175 223 82 118 ~288 #433

SBTR ‐ 109 140 267 343 130 169 318 389


WBT ‐ 118 155 156 179 147 197 169 198

WBR ‐ 109 182 119 183 112 193 130 205

NBL ‐ 0 m0 1 m15 0 m0 35 m348

NBT ‐ 88 m410 88 356 204 m412 85 m354


EBLTR ‐ 409 #502 195 213 ~604 #701 213 226

NBTR ‐ 78 130 24 62 115 196 66 145

SBL ‐ 46 87 37 68 47 93 41 82

SBT ‐ 14 35 13 31 28 60 36 72


EBTR ‐ ~166 m#613 45 75 ~674 m#634 70 164

SBL ‐ 170 #302 269 379 195 #384 284 m356

SBT ‐ 184 229 285 337 213 266 302 352


EBL ‐ 129 m132 179 261 121 m108 176 m260

EBT ‐ 139 m140 192 251 134 m119 191 264

NBT ‐ 261 #337 221 266 288 #377 314 #408

NBR ‐ 22 60 67 140 33 78 141 #296


EBLTR ‐ ‐ 1 ‐ 0 ‐ 1 ‐ 0

WBLTR ‐ ‐ 1 ‐ 3 ‐ 1 ‐ 3

NBLTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBLTR ‐ ‐ 0 ‐ 1 ‐ 1 ‐ 1


WBLR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0

NBTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBLTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0


EBR ‐ ‐ 2 ‐ 2 ‐ 2 ‐ 2

SBTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0


EBTR ‐ 72 105 87 117 91 138 102 132

WBLT ‐ 55 84 131 174 53 86 133 174

SBL ‐ 84 148 38 81 131 229 47 100

SBTR ‐ 97 127 152 215 136 171 173 247


EBLT ‐ ‐ 6 ‐ 4 ‐ 10 ‐ 13

WBTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBLR ‐ ‐ 15 ‐ 16 ‐ 33 ‐ 83


EBLT ‐ ‐ 136 ‐ 229 ‐ 262 ‐ 397

EBR ‐ ‐ 19 ‐ 7 ‐ 28 ‐ 31

WBLTR ‐ ‐ 2 ‐ 5 ‐ 2 ‐ 7

NBLRT ‐ ‐ 6 ‐ 17 ‐ 16 ‐ 42

SBLT ‐ ‐ 0 ‐ 1 ‐ 0 ‐ 1

SBL ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0



Table 5‐3

Future Conditions without Development Intersection Queuing Summary 1, 2, 3, 4


Storage Length(ft)

Existing Conditions (2018) Future Conditions without Development (2023)

AM Peak Hour AM Peak HourPM Peak Hour PM Peak Hour


March 14, 2019

52


March 14, 2019

SECTION 6 PROPOSED SITE DESCRIPTION, TRIP GENERATION, DISTRIBUTIONS & ASSIGNMENTS

Proposed Site Redevelopment Description

The Applicant proposes to raze the existing 307 room hotel and parking garage and redevelop the site with a single new building. The building is proposed to feature two (2) towers with the west tower containing the residential uses and the east containing the hotel. In total the redeveloped site would contain approximately 339 hotel rooms, 490 residential units, 7,695 S.F. of ground-level hotel restaurant, and 5,770 S.F. of civic space. To implement the proposed redevelopment the Applicant has filed a Rezoning Application and Major Site Plan Amendment. As noted previously, for purposes of this Multimodal TIA, the restaurant and civic uses were assumed as retail to provide a conservative analysis.

Parking for the site is proposed via structured parking. The site will include separate parking garages for the residential uses and the hotel/retail uses. The hotel uses will park in a below grade garage containing approximately 420 parking spaces while the residential portion of the site parks in an above grade parking garage containing approximately 438 parking spaces.

For purposes of this analysis, it is assumed that the redevelopment would occur in a single phase and would be constructed and fully occupied by 2023.

This project is consistent with the recommendations of the Rosslyn Sector Plan. The project has active ground floor uses along the Fort Myer Drive frontage and improves the frontage streetscape to be in line with the plan recommendations.

Proposed Site Access and Circulation

The hotel and residential uses of the site, while within a single building, will operate separately, with the residential uses fronting N. Nash Street and the hotel/retail fronting N. Fort Myer Drive. The three (3) existing curb cuts that currently serve the existing hotel are proposed to remain and an additional curb cut is proposed along N. Fort Myer Drive.

The hotel/retail uses of the site that front N. Fort Myer Drive will be served by the two (2) access points; the existing curb cut on N. Fort Myer Drive and a new curb cut to the north. The northern access point serving the hotel will serve the hotel pick-up/drop-off loop. The southern site access point on N. Fort Myer Drive provides direct access to/from the hotel parking garage. Motorists that enter the pick-up/drop-off loop to the north can gain access to the hotel parking garage internal to the site and do not have to re-enter N. Fort Myer Drive. This would facilitate valet parking that may be provided during peak periods or events at the hotel. Additionally, a lay-by lane is proposed along N. Fort Myer Drive to manage tour bus parking with storage for approximately two (2) buses.

53


March 14, 2019

The residential uses, fronting N. Nash Street, will be served by the existing north access point. This driveway will provide residents with direct access to/from the residential parking garage. The south site driveway along N. Fort Myer Drive is proposed to accommodate loading for all uses within the site. Along the N. Nash Street site frontage, short term parking spaces are proposed to facilitate short-term deliveries, ride-sharing vehicles, and taxis.

As recommended in the Rosslyn Sector Plan, the proposal includes an east-west pedestrian connection through the site. Pedestrians could use this path to cut through the block and gain quicker access between N. Nash Street and N. Fort Myer Drive.

A detailed exhibit showing the site circulation and proposed access is shown on Figure 6-1.

Loading and Service Operation

As described previously, loading for all uses of the site are proposed via a service driveway along N. Nash Street. Within the service area a total of four (4) loading docks are proposed. Thisamount of loading docks is in compliance with the zoning ordinance requirement. To facilitatetruck turning movements, six (6) parking spaces would be removed on the west side of N. NashStreet.

54

HO

TE

L P

IC

K-U

P / D

RO

P-O

FF

(O

NE

W

AY

)

TO HOTEL

GARAGE

PEDESTRIAN PATHWAY

PR

OP

OS

ED

S

HO

RT

T

ER

M P

AR

KIN

G

NORTH

O:\

PRO

JECT

S\70

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7500

\748

7 HO

LIDA

Y IN

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OSS

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- GR

APHI

CS.D

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Figure 6-1Site Access & Circulation Exhibit


HOTEL ACCESS

RESIDENTIAL ACCESS

SERVICE / LOADING

55


March 14, 2019

Site Trip Generation Analysis

As described previously in the report, vehicular traffic counts were collected on April 11, 2018 at the study intersections, including the site driveways. As shown in Table 6-1 the observed peak hour traffic volumes at the three (3) site driveways serving the existing site total 70 AM peak hour trips (38 in and 32 out) and 78 PM peak hour trips (27 in and 51 out).

The Applicant proposes to redevelop the site with a mix of residential, hotel, and retail uses. The number of new site trips anticipated to be generated by the redevelopment was estimated based on ITE’s Trip Generation Manual, 10th Edition Land Use Codes (LUC) 222 (Residential), 310 (Hotel), and 820 (Retail). This edition of the manual accounts for the site’s proximity to transit and other non-auto modes and provides rates/equations appropriate for its surroundings. For purposes of this study, the high density multi-use rates were assumed for the retail space since the site is located within Rosslyn. These rates account for an approximately 35 to 65 percent non-auto mode share.

It is noted that the hotel would contain meeting and conference space. The peak hour trips associated with this space are accounted for in the trip generation rates, with the majority of demand occurring outside of the AM and PM peak hours.

The new vehicle trips associated with the redevelopment equates to 260 AM peak hour trips (115 in and 145 out) and 317 PM peak hour trips (170 in and 147 out). When compared to that of the existing hotel site, the redeveloped site would generate an additional 190 AM peak hour trips (77 in and 113 out) and 239 additional PM peak hour trips (143 in and 96 out). Refer to Table 6-1 for a summary of the site trip generation.

56

Table 6‐11900 Fort Myer DriveTrip Generation Analysis

WeekdayIn Out Total In Out Total ADT

Existing UseHotel 1 307 Rooms 38 32 70 27 51 78 1,685

Proposed Use 2

Multifamily Residential (High‐Rise) ‐ Center City Core 220 490 DU 41 67 108 66 47 113 1,058Hotel ‐ Center City Core 310 339 Rooms 56 63 119 69 67 136 1,861Retail (Shopping Center) ‐ Dense Multi‐Use Urban 3 820 13,755 SF 18 15 33 35 33 68 680Subtotal 115 145 260 170 147 317 3,599

Difference (Existing vs Proposed) 77 113 190 143 96 239 1,914

Notes: 1. Based on Driveway counts collected by Wells + Associates on April, 11th 2018.2. Trip Generation based on ITE's Trip Generation Manual, 10th Edition.3. Trip generation calculated using retail use to be conservative. Likely uses include a hotel restaurant (10,613 SF) and community civic space (3,142 SF).

Land UseITE Code

Size Weekday AM Peak Hour Weekday PM Peak HourUnits


March 14, 2019

57


March 14, 2019

Site Trip Distribution and Assignment

The trips associated with the existing hotel site were removed from the roadway network based on driveway counts and regional peak hour traffic directional splits. Refer to Figure 6-2 for the removal of site trips.

The new trips generated by the redevelopment were assigned to the roadway network using trip distributions developed from the traffic count data and existing observed intersection splits and directions of approaches. The trips were assigned to the appropriate site driveway depending on the user destination. These distributions were reaffirmed with County staff through the scoping process.

The directional distribution for new site generated trips are as follows:

To/From the West on GW Memorial Parkway: To/From the East on Lee Highway/I66: To/From the West on Lee Highway/I66: To/From the South on Fort Myer Drive/Lynn Street: To/From the North on Key Bridge: Total:

10% 20% 25% 30% 15% 100%

Refer to Figure 6-3 for hotel/retail site trips and Figure 6-4 for the assignment of residential site trips.

58

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5139

2 3

6

10

11 12


19TH STREET N

N O

AK STREET N N

ASH

STRE

ET

NORTH


Figure 6-2Existing Site Trips Removed


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

DRIVEWAY

GASSTATION

0/00/0

0/00/0-4/-3

0/0-2/-8

-3/-2-11/-8

-1/-1-1/-1

0/0-2/-2

-3/-60/0

-4/-30/0

-8/-20-2/-8

-7/-7-6/-2

0/0

-12/-90/0

-7/-6-7/-16

0/00/0

-4/-10-3/-6

0/0-3/0

-8/-10

-10/-270/00/-1

-6/-40/-10/0

0/-10/00/0

0/-1-3/-1

0/-10/-1

-3/-1-6/-4

-18/-11-1/-4

-22/-21-4/-3

-14/-20-5/-2

-3/-30/0

0/00/0

0/-20/0

-3/-4-1/-2

0/0-6/-1

-4/-5-3/-1

0/0

0/00/00/0

0/00/00/-1

0/00/00/0


000 / 000

59

INTERSTATE

66


N FO

RT MYER DRIVE

N LYN

N STREET

17TH STREET N

N Q

UIN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET

1

5

%

1

0

%

2

0

%

25%

2

5

%

5

%

SITE

1

4

7

8

5

13

9

2

3

6

10

11

12


19TH STREET N

N O

AK STREET N NA

SH S

TREE

T

FRAN

CIS

SCOT

TKE

Y BR

IDGE

GEORGE WASHINGTON

MEMORIAL PARKWAY

WILSON BOULEVARD

1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

SITE

DRIVEWAYDRIVEWAY

GASSTATION

NORTH


Figure 6-3Hotel Site Generated Trips


0/0

0/0

0/0

20/25

0/0

0/0

0/0

0/0

18/26

20/25

34/47

0/0

15/21

20/25

39/51

0/0

0/0

4/5

0/0

0/0

19/26

0/0

52/73

0/0

23/31

0/0

16/20

59/76

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

4/5

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

4/5

38/52

0/0

78/100

2/3

20/28

56/70

0/0

0/0

0/0

0/0

0/0

0/0

4/5

0/0

0/0

0/0

0/0

2/3

0/0

0/0

0/0

0/0

0/0

0/0

4/5

0/0

0/0

0/0

35/49

36/50

0/0

AM PEAK HOUR

PM PEAK HOUR

000 / 000

60

INTERSTATE

66


N FO

RT MYER DRIVE

N LYN

N STREET

17TH STREET N

N Q

UIN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET

1

5

%

1

0

%

2

0

%

25%

2

5

%

5

%

SITE

1

4

7

8

5

13

9

2

3

6

10

11

12


19TH STREET N

N O

AK STREET N NA

SH S

TREE

T

FRAN

CIS

SCOT

TKE

Y BR

IDGE

GEORGE WASHINGTON

MEMORIAL PARKWAY

WILSON BOULEVARD

1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

SITE

DRIVEWAYDRIVEWAY

GASSTATION

NORTH


Figure 6-4Residential Site Generated Trips


0/0

0/0

0/0

0/0

18/30

0/0

17/12

10/17

0/0

8/13

0/0

0/0

8/13

17/12

0/0

18/30

0/0

30/21

17/12

10/17

0/0

0/0

0/0

0/0

0/0

30/21

0/0

0/0

13/9

17/12

0/0

0/0

28/47

47/33

0/0

20/14

12/20

0/0

0/0

0/0

0/0

0/0

20/14

0/0

0/0

0/0

0/0

12/20

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

9/6

0/0

0/0

20/14

12/20

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

0/0

12/20

12/8

0/0

9/6

0/0

0/0

0/0

AM PEAK HOUR

PM PEAK HOUR

000 / 000

61


March 14, 2019

SECTION 7 FUTURE CONDITIONS WITH DEVELOPMENT (2023)

This section presents an analysis of the future conditions including projections of 2023 future traffic forecasts with the proposed development, as well as capacity and queuing analyses.

Future Traffic Forecasts with Development (2023)

The traffic forecasts described in the previous section and shown on Figures 6-2 through 6-4 were added to the future traffic forecasts without development, shown on Figure 5-4, to arrive at the future traffic forecasts with development and are shown on Figure 7-1. The future lane use with development are shown on Figure 7-2.

62

INTERSTATE

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5

13

9

2

3

6

10

11

12


19TH STREET N

N O

AK STREET N NA

SH S

TREE

T

NORTH


Figure 7-1Future Peak Hour Traffic Forecasts With Development (2023)


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

SITE

DRIVEWAYDRIVEWAY

GASSTATION

6/3

7/36

11/9

521/1258

77/121

42/60

69/96

265/350

1058/1592

296/940

220/196

436/348

299/524

2439/2016

217/613

64/110

80/92

169/129

95/105

95/142

2336/1057

17/52

906/1068

371/720

515/315

2073/963

133/318

1779/1912

1176/1090

879/717

1/5

130/199

28/47

47/33

0/0

20/14

12/20

210/200

0/1

0/0

0/0

6/1

150/213

0/0

0/0

0/0

0/0

223/221

37/51

1346/1279

78/100

217/169

855/1009

359/205

105/240

98/195

168/120

253/279

90/145

65/57

86/98

181/388

254/230

117/125

113/231

207/167

3/11

11/14

0/3

1/0

4/3

243/235

154/252

149/136

3/2

167/149

38/52

1385/1331

0/0

AM PEAK HOUR

PM PEAK HOUR

000 / 000

63

66


N FO

RT MYER DRIVE

N LYN

N STREET

KEY BOULEVARD N KEN

T STREET

N M

OO

RE STREET

N N

ASHSTREET

SITE

1

4

7

8

5139

2 3

6

10

11 12


19TH STREET N

N O

AK STREET N N

ASH

STRE

ET

NORTH


Figure 7-2Future Lane Use and Traffic Controls with Development (2023)


1

LEE

HIGHWAY(WESTBOUND)

MARRIO

T

STREET

N. N

ASH

LEE

HIGHWAY(WESTBOUND)

DRIVEWAY

2

LEE

HIGHWAY(WESTBOUND)

N. FO

RTM

YER

DRIVE

N. FO

RTM

YERLEE

HIGHWAY(WESTBOUND)

DRIVE

3

LEE

HIGHWAY(WESTBOUND)

N. LYN

N

STREET

N. LYN

NLEE

HIGHWAY(WESTBOUND)

STREET

4

LEE

HIGHWAY(EASTBOUND)

N. N

ASH

STREET

N. N

ASH

LEE

HIGHWAY(EASTBOUND)

STREET

5

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

6

LEE

HIGHWAY(EASTBOUND)

LEE

HIGHWAY(EASTBOUND)

N. LYN

N

STREET

N. LYN

N

STREET

7

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

NORTHSITE

STREET

8

DRIVEWAY

N. N

ASH

STREET

N. N

ASH

STREET

SOUTHSITE

9

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER

DRIVE

SITE

DRIVEWAY

11

N. N

ASH

STREET

KEY

BOULEVARDBOULEVARD

KEY

12

19THN

. NASH

KEY

BOULEVARD

STREETSTREET N

.

10

19TH

STREET N.

N. FO

RTM

YER

DRIVE

N. FO

RTM

YER19TH

STREET N.DRIVE

APARTMENT

DRIVEWAY

13

N. N

ASH

STREET

N. N

ASH

STREET

SITE

DRIVEWAYDRIVEWAY

GASSTATION

64


March 14, 2019

Operational Analysis of Future Conditions with the Proposed Development

Future peak hour LOS and 50th and 95th percentile queues with the proposed development were estimated at the study intersections based on the future peak hour traffic forecasts with redevelopment shown on Figure 7-1, the future conditions lane use and traffic controls shown on Figure 7-2; the existing traffic signal phasing/timings obtained from Arlington County; and the HCM 2000 methodologies using Synchro Software, version 10. The results are presented in Appendix H and summarized in Table 7-1 and Table 7-2.

Levels of Service. As shown in Table 7-1, with the proposed development, the signalized study intersections would continue to operate at overall acceptable levels of service (LOS “D” or better) during both the AM and PM peak hours with the exception of the N. Fort Myer Drive/Lee Highway EB intersection, which operate beyond capacity (LOS “F”) during the AM peak hour. When compared to future conditions without development overall delay per vehicle at the existing signalized intersections would increase by six (6) seconds or less during the AM and PM peak hours. The results indicate that only minor increases in delay would occur with the redevelopment of the site.

Consistent with future conditions without development some lane groups, particularly at the Key Boulevard/19th Street N. intersection, would continue to operate beyond capacity during the peak periods.

As noted under the existing and future without redevelopment conditions, it is acknowledged that the closely spaced intersections along Lee Highway and N. Nash Street experience queuing during the peak hours that limit the ability of vehicles to traverse the intersections. Thus, the reported level of service may not fully represent actual conditions.

A robust Transportation Demand Management (TDM) program will be implemented to ensure users of the site are familiar and use multimodal transportation options. The site’s location makes it a prime location for multimodal commuting given its excellent transit, pedestrian, and bicycle facilities. The non-auto mode share expected would further aid in minimizing the development’s vehicular impact.

Consistent with existing and future conditions without development, the eastbound left turn movement at the Key Boulevard/19th Street N. would continue to operate beyond capacity during peak periods. Based on previously prepared studies in the area, it is unlikely that warrants for signalization would be met at this location based on the projected traffic volumes. As described previously, this intersection is in close proximity to the existing traffic signal at Fort Myer Drive and would require coordination and accommodate the existing driveways serving the service station and church on the east side of 19th Street.

A number of improvements are planned as part of the 1401 Wilson Boulevard project that would improve traffic conditions in this area. They include modification to 19th Street roadway cross section that would narrow the roadway width and improve pedestrian and bicycle safety and

65


March 14, 2019

overall traffic operations in the vicinity of the Key Boulevard intersections at both 19th Street and Nash Street. Further, the long-range plans for Rosslyn that include conversion of Fort Myer Drive to two-way operation may improve operations in this area.

A review of the proposed access points indicates that all site driveway turning movements would operate at LOS “A” during the AM and PM peak periods.

Queueing. As shown on Table 7-2, the results of the queueing analysis are similar to those described in under existing conditions and future conditions without development. Increases in the estimated average and 95th percentile queues when compared to future conditions would equate to approximately one (1) vehicle or less. Those turn lanes identified under the existing conditions would continue to exceed the available storage on occasion in the future without development.

Metered conditions due to the closely spaced intersections would continue to exist under the future conditions with redevelopment. This limits vehicles from entering and exiting the Rosslyn street grid, thus causing vehicle queuing upstream and downstream.

Potential Signal Timing Improvements

As noted under the previous section, the intersection of N. Fort Myer Drive/Lee Highway EB would operate at overall LOS “F” during the AM peak hour. Also, individual movements at this location would operate at or beyond capacity during the AM peak hour. Additionally, the westbound through movement at the N. Fort Myer Drive/Lee Highway WB during the PM peak hour and the northbound through movement at the N. Lynn Street/Lee Highway EB intersection would operate at LOS “E”.

Minor signal timing adjustments (1 second) were made at these locations to improve levels of service at these locations. As shown in Table 5-2, timing adjustments can restore levels of service back to future conditions without redevelopment or better.

66


LOS Delay (s) LOS Delay (s) LOS Delay (s) LOS Delay (s) LOS Delay (s) LOS Delay (s) LOS Delay (s) LOS Delay (s)1. N. Nash Street & Lee Highway (WB) ‐ SignalizedWBL C 26.7 C 26.1 C 27.0 C 22.2 C 27.0 C 22.1 C 27.0 C 21.7

WBTR C 30.3 C 32.7 C 33.7 D 35.2 C 33.5 C 34.7 C 33.5 C 34.5

NBLT A 3.9 B 15.7 A 2.5 C 24.2 A 2.3 C 24.4 A 2.3 C 24.4

SBTR A 6.3 B 10.7 A 7.3 B 19.9 A 7.6 C 20.3 A 7.6 C 20.3

Overall C 27.2 C 30.2 C 28.2 C 32.9 C 27.6 C 32.4 C 27.6 C 32.12. N. Fort Myer Drive & Lee Highway (WB) ‐ Signalized 3

WBL C 23.1 C 22.9 C 22.2 C 25.0 C 24.2 C 25.9 C 23.8 C 25.0

WBT C 24.3 C 30.1 C 23.5 E 58.1 C 23.6 E 69.5 C 23.3 E 57.7

SBTR A 8.1 B 14.6 A 8.9 B 19.1 A 9.4 B 19.7 A 9.4 C 21.1

Overall B 11.7 B 18.7 B 12.6 C 31.3 B 13.6 D 35.4 B 13.5 C 32.63. N. Lynn Street & Lee Highway (WB)‐ SignalizedWBT C 34.1 C 29.5 C 34.8 C 29.0 C 34.5 C 28.5 C 34.5 C 28.5

WBR D 38.7 D 35.1 C 35.0 D 35.6 D 35.3 D 35.8 D 35.3 D 35.8

NBL A 0.6 A 2.5 A 0.3 A 8.3 A 0.4 B 10.1 A 0.6 B 10.0

NBT A 7.5 A 8.2 A 9.1 A 8.0 A 9.5 A 8.4 A 9.8 A 8.4

Overall B 12.9 B 13.7 B 14.3 B 13.7 B 14.5 B 14.2 B 14.7 B 14.24. N. Nash Street & Lee Highway (EB) ‐ SignalizedEBLTR C 24.1 C 26.8 D 51.5 C 24.2 D 53.8 C 23.7 D 53.8 C 23.7

NBTR C 28.7 B 12.4 C 33.1 B 17.0 D 38.0 B 17.9 D 38.0 B 17.9

SBL C 28.4 B 12.3 C 29.9 B 15.6 C 31.6 B 16.4 C 31.6 B 16.3

SBT C 24.2 B 10.7 C 25.1 B 13.8 C 25.4 B 14.8 C 25.4 B 14.8

Overall C 24.5 C 23.7 D 48.9 C 22.1 D 51.0 C 21.9 D 51.0 C 21.95.N. Fort Myer Drive & Lee Highway (EB) ‐ Signalized 3

EBTR C 27.6 B 11.6 F 91.4 B 16.7 F 99.7 B 18.2 F 88.4 B 18.2

SBL D 45.2 C 32.7 E 59.9 C 32.9 E 63.3 C 32.5 E 71.1 C 31.7

SBT C 33.5 C 29.4 D 35.6 C 29.7 D 36.3 C 29.1 D 38.5 C 28.3

Overall C 30.4 C 22.3 E 75.0 C 24.5 F 80.8 C 24.8 E 74.4 C 24.46. N. Lynn Street & Lee Highway (EB) ‐ Signalized 3

EBL B 13.9 B 17.9 B 10.5 B 18.4 B 10.8 B 18.6 B 13.0 B 18.6

EBT B 12.2 B 16.0 B 10.4 B 16.4 B 10.4 B 16.3 B 12.6 B 16.3

NBT D 38.4 C 26.6 D 47.6 D 38.5 E 55.8 D 45.3 D 46.8 D 45.3

NBR C 23.2 C 25.8 C 24.3 D 41.7 C 25.1 D 47.7 C 24.3 D 47.7

Overall C 23.7 C 21.5 C 26.9 C 29.0 C 30.8 C 33.0 C 28.0 C 33.07. N. Nash Street & North Site Driveway ‐ UnsignalizedEBLTR B 10.6 A 9.9 B 11.8 B 11.4 B 13.3 B 14.8 B 13.3 B 14.8

WBLTR A 9.3 A 9.3 A 9.7 A 10.0 B 11.1 B 11.6 B 11.1 B 11.6

NBLTR A 0.0 A 0.1 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0

SBLTR A 0.8 A 0.8 A 0.5 A 0.4 A 1.5 A 1.8 A 1.5 A 1.88. N. Nash Street & South Site Driveway ‐ UnsignalizedWBLR A 0.0 A 9.2 A 0.0 B 10.3 A 0.0 A 0.0 A 0.0 A 0.0

NBTR A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0

SBLTR A 0.4 A 0.1 A 0.2 A 0.0 A 0.0 A 0.0 A 0.0 A 0.09. N. Fort Myer Drive & South Site Driveway ‐ UnsignalizedEBR A 9.0 A 8.9 A 9.2 A 9.1 A 9.6 A 9.5 A 9.6 A 9.5

SBTR A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.010. N. Fort Myer Drive & 19th Street N. ‐ SignalizedEBTR C 24.7 C 24.2 C 25.5 C 24.6 C 25.7 C 24.7 C 25.7 C 24.7

WBLT C 24.4 C 29.7 C 24.4 C 30.4 C 24.4 C 30.4 C 24.4 C 30.4

SBL B 17.0 B 13.5 C 21.6 B 14.3 C 26.1 B 16.3 C 26.1 B 16.3

SBTR B 13.9 B 16.0 B 15.0 B 16.9 B 15.0 B 16.9 B 15.0 B 16.9

Overall B 18.2 C 20.4 B 19.3 C 20.9 C 20.1 C 20.9 C 20.1 C 20.911. N. Nash Street & Key Boulevard ‐ UnsignalizedEBLT A 2.8 A 2.5 A 3.5 A 4.5 A 3.4 A 4.5 A 3.4 A 4.5

WBTR A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0

SBLR B 13.5 B 13.8 C 16.0 D 26.8 C 18.3 D 32.9 C 18.3 D 32.912. Key Boulevard & 19th Street ‐ UnsignalizedEBL F 61.9 F 256.2 F 214.3 F 886.0 F 282.0 F Err F 282.0 F Err

EBR B 13.3 B 13.5 B 14.0 C 15.9 B 14.3 C 16.3 B 14.3 C 16.3

WBLTR B 10.6 C 18.0 B 12.1 C 22.7 B 12.4 C 24.7 B 12.4 C 24.7

NBLTR A 2.7 A 5.5 A 5.1 A 9.5 A 5.5 B 10.3 A 5.5 B 10.3

SBLT A 0.2 A 0.6 A 0.1 A 0.6 A 0.1 A 0.6 A 0.1 A 0.6

SBR A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.0 A 0.013. Fort Myer Drive & North Site Driveway ‐ UnsignalizedEBR ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ A 0.0 A 0.0 A 0.0 A 0.0

SBTR ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ A 0.0 A 0.0 A 0.0 A 0.0


Future Conditions with Development Intersection Level of Service Summary 1, 2

Approach/ Lane GroupFuture Conditions without Development (2023)Existing Conditions (2018)

PM Peak Hour

Future Conditions with Development (2023) with Improvements


Future Conditions with Development (2023)

AM Peak Hour PM Peak Hour AM Peak Hour AM Peak Hour PM Peak Hour


March 14, 2019

67


50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile

50th Pecentile

95th Pecentile


WBL 145 21 47 22 m31 33 64 45 m49 42 70 58 m61 42 70 57 m62

WBTR ‐ 104 134 211 234 168 212 400 m403 174 208 402 m398 174 208 403 m408

NBLT ‐ 7 m12 41 81 7 m13 81 145 7 m12 84 149 7 m12 84 149

SBTR ‐ 2 8 11 32 2 11 15 39 2 12 15 39 2 12 15 39

WBL ‐ 33 64 52 95 80 141 57 m109 99 158 80 m138 98 158 78 m135

WBT ‐ 64 95 175 223 82 118 ~288 #433 90 122 ~331 #460 89 122 ~301 #448

SBTR ‐ 109 140 267 343 130 169 318 389 131 193 329 403 131 193 339 415


WBT ‐ 118 155 156 179 147 197 169 198 150 202 171 206 150 202 171 206

WBR ‐ 109 182 119 183 112 193 130 205 116 202 135 216 116 202 135 216

NBL ‐ 0 m0 1 m15 0 m0 35 m348 0 m0 47 m62 0 m0 47 m62

NBT ‐ 88 m410 88 356 204 m412 85 m354 340 m409 85 m327 391 m417 85 m327


EBLTR ‐ 409 #502 195 213 ~604 #701 213 226 ~611 #708 218 232 ~611 #708 218 232

NBTR ‐ 78 130 24 62 115 196 66 145 143 #257 73 156 143 #257 73 156

SBL ‐ 46 87 37 68 47 93 41 82 47 95 43 86 47 95 42 86

SBT ‐ 14 35 13 31 28 60 36 72 37 73 50 94 37 73 50 94


EBTR ‐ ~166 m#613 45 75 ~674 m#634 70 164 ~694 m#648 75 #226 ~684 m#638 75 #226

SBL ‐ 170 #302 269 379 195 #384 284 m356 198 #397 288 m358 198 #406 289 m350

SBT ‐ 184 229 285 337 213 266 302 352 219 275 306 356 219 #279 306 356


EBL ‐ 129 m132 179 261 121 m108 176 m260 123 m107 182 m257 142 m121 182 m257

EBT ‐ 139 m140 192 251 134 m119 191 264 134 m117 195 m260 173 m132 195 m260

NBT ‐ 261 #337 221 266 288 #377 314 #408 ~310 #399 ~346 #436 297 #388 ~346 #436

NBR ‐ 22 60 67 140 33 78 141 #296 40 91 156 #324 41 90 156 #324


EBLTR ‐ ‐ 1 ‐ 0 ‐ 1 ‐ 0 ‐ 1 ‐ 0 ‐ 1 ‐ 0

WBLTR ‐ ‐ 1 ‐ 3 ‐ 1 ‐ 3 ‐ 9 ‐ 7 ‐ 9 ‐ 7

NBLTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBLTR ‐ ‐ 0 ‐ 1 ‐ 1 ‐ 1 ‐ 2 ‐ 3 ‐ 2 ‐ 3


WBLR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0

NBTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBLTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0


EBR ‐ ‐ 2 ‐ 2 ‐ 2 ‐ 2 ‐ 8 ‐ 10 ‐ 8 ‐ 10

SBTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0


EBTR ‐ 72 105 87 117 91 138 102 132 95 143 104 135 95 143 104 135

WBLT ‐ 55 84 131 174 53 86 133 174 53 85 132 173 53 85 132 173

SBL ‐ 84 148 38 81 131 229 47 100 166 294 77 153 166 294 77 153

SBTR ‐ 97 127 152 215 136 171 173 247 136 172 174 249 136 172 174 249


EBLT ‐ ‐ 6 ‐ 4 ‐ 10 ‐ 13 ‐ 9 ‐ 13 ‐ 9 ‐ 13

WBTR ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBLR ‐ ‐ 15 ‐ 16 ‐ 33 ‐ 83 ‐ 45 ‐ 107 ‐ 45 ‐ 107


EBLT ‐ ‐ 136 ‐ 229 ‐ 262 ‐ 397 ‐ 307 ‐ Err ‐ 307 ‐ Err

EBR ‐ ‐ 19 ‐ 7 ‐ 28 ‐ 31 ‐ 31 ‐ 34 ‐ 31 ‐ 34

WBLTR ‐ ‐ 2 ‐ 5 ‐ 2 ‐ 7 ‐ 2 ‐ 7 ‐ 2 ‐ 7

NBLRT ‐ ‐ 6 ‐ 17 ‐ 16 ‐ 42 ‐ 19 ‐ 49 ‐ 19 ‐ 49

SBLT ‐ ‐ 0 ‐ 1 ‐ 0 ‐ 1 ‐ 0 ‐ 1 ‐ 0 ‐ 1

SBL ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0 ‐ 0

13. Fort Myer Drive & North Site Driveway ‐ Unsignalized

EBR ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0

SBTR ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ 0 ‐ 0 ‐ 0 ‐ 0


PM Peak Hour

Future Conditions with Development (2023) with Improvements



Table 7‐2

Future Conditions with Development Intersection Queuing Summary 1, 2, 3, 4


Storage Length(ft)

Existing Conditions (2018) Future Conditions without Development (2023) Future Conditions with Development (2023)

AM Peak Hour AM Peak Hour AM Peak HourPM Peak Hour PM Peak Hour


March 14, 2019

68


March 14, 2019

SECTION 8 CONCLUSIONS AND RECOMMENDATIONS The conclusions and recommendations of this study are as follows: 1. The site is well-served by a multimodal transportation system that includes arterial, collector,

and local streets; a connected network of sidewalks with ramps and pedestrian countdown heads; numerous bus lines; easy access to the Rosslyn Metrorail Station; carsharing; and bicycle facilities.

2. The seven (7) signalized study intersections currently operate at overall acceptable LOS “D” or better during the AM and PM peak hours. However, it is acknowledged that constrained conditions exist in Rosslyn that impact operations and the reported levels of service and queuing during peak hours. All turning movements at the unsignalized study intersections operate at acceptable LOS with the exception of the eastbound left turn movement from Key Boulevard onto 19th Street N.

3. In the future without redevelopment the seven (7) signalized study intersections would

experience increases in delay as a result of approved development and regional growth, but would continue to operate at overall acceptable LOS “D” or better during the AM and PM peak hours with the exception of the N. Fort Myer Drive/Lee Highway EB intersection, acknowledging the road network constraints. All turning movements at the unsignalized study intersections would continue to operate at acceptable LOS with the exception of the eastbound left turn movement from Key Boulevard onto 19th Street N. that would experience increases in delay and queuing.

4. The existing 307-room hotel is proposed to be razed and redeveloped with a new mixed-use

building containing residential (490 units), hotel (339-rooms), and retail (10,613 S.F.) and civic space (3,142 S.F.). (It is noted that the hotel will contain meeting/conference space that would not impact traffic during the commuter peak hours.) The site will utilize the existing the driveways and construct an additional driveway along N. Fort Myer Drive. Parking for the site is proposed via two (2) parking garages; one to serve the residential uses and one to serve the hotel/retail uses. The proposal includes a pick-up/drop-off loop internal to the site to serve the hotel, thus reducing impacts on the public streets.

5. Upon completion of the redevelopment the site is estimated to generate an additional 190 AM peak hour trips (77 in and 113 out) and additional 239 PM peak hour trips (143 in and 96 out) when compared to the existing hotel. These totals account for the multiple alternative modes of transportation available in the vicinity of the site.

6. In the future with the redevelopment of the site, the seven (7) signalized study intersections would continue operate at overall acceptable LOS “D” or better during the AM and PM peak hours (with the noted network constraints), with the exception of the N. Fort Myer Drive/Lee Highway EB intersection. All turning movements at the unsignalized study intersections

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would continue to operate at acceptable LOS with the exception of the eastbound left turn movement from Key Boulevard onto 19th Street N. that would experience increases in delay and queuing. Traffic operations and safety at the Key Boulevard/19th Street intersection would benefit from planned improvements as other adjacent parcels are developed in the future and as the long-range plan for Rosslyn is implemented. As shown in Table 5-2, minor signal timing adjustments can restore levels of service back to future conditions without redevelopment.

7. All four (4) proposed site driveways on both N. Nash Street and N. Fort Myer Drive wouldoperate at LOS “A” during the peak periods with minimal queueing under full buildoutconditions.

8. The vehicular impacts of the project would be minimized through the design of the accesssystem proposed to serve the site. The drop-off/pick-up lane serving the hotel would providedirect access to the parking garage and would minimize potential impacts to Fort Myer Drive.Parking for tour buses is proposed along the west side of Fort Myer Drive to accommodatethese vehicles. Short-term parking is proposed along the east side of Nash Street adjacent tothe residential lobby for short-term deliveries, ride-sharing vehicles, and taxis to minimizeconflicts and facilitate traffic flow along Nash Street.

9. The implementation of a Transportation Management Plan (TMP) would continue toencourage the use of other non-auto modes of transportation including walking, bicyclingand public transit as alternative to single occupancy vehicles and minimize the project’svehicular traffic impacts.

10. The proposed redevelopment at 1900 Fort Myer Drive would improve the existing hotel andbring a vibrant mixed-use development to the site. The combination of high density, mixed-use nature, and enhanced multimodal characteristics of the proposal are consistent with theGLUP and Rosslyn Sector Plan recommendations.

O:\Projects\7001 - 7500\7487 Holiday Inn Rosslyn at Key Bridge\Documents\Reports\1900 Fort Myer Drive Multimodal TIA (Submission 3.14.19).docx

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