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County of Fairfax, Virginia
Reston Network AnalysisCommunity Meeting Tier 1 & Tier 2
May 18, 2016
Kristin CalkinsFairfax County Department of Transportation
County of Fairfax, Virginia
Agenda• Purpose of the Study• Network Analysis Process• Tier 1 & Tier 2 Results• Funding Update• Next Steps• Question & Answer
Department of Transportation 2
County of Fairfax, Virginia
Purpose of Study• Conduct a detailed analysis of the grid of streets and
determine– A finalized grid of streets– Number of lanes between and at intersections– How to best accommodate transit, bikes, and pedestrians– Right-of-way needs
• Assign urban street types and modal emphasis based on the Urban Street Standards from the Department of Rail and Public Transportation
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County of Fairfax, Virginia
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Study Area
County of Fairfax, Virginia
How we got here:Reston Phase I Plan Amendment
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County of Fairfax, Virginia
Need for Study
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• The Reston Phase I Comprehensive Plan Amendment was adopted by the Fairfax County Board of Supervisors on February 11, 2014.
• The Board follow-on motion from the adoption directed staff to: – “conduct a detailed evaluation and operational analysis of the enhanced
street network shown on the Reston Master Plan, prioritize these improvements, and develop an implementation strategy.”
– “conduct an inclusive process to prepare a funding plan for the transportation improvements recommended in the Reston Master Plan and report with its recommendations. The funding plan should include arrangements for financing the public share of Reston infrastructure improvements and facilitate co-operative funding agreements with the private sector. The PC strongly believes that public and private investment in Reston is both critical and responsible for ensuring Reston’s future success”
County of Fairfax, Virginia
Need for Study (Cont.)Follow-on Study to the Reston Phase I Plan Amendment
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County of Fairfax, Virginia
Reston Phase I Plan AmendmentTransportation Recommendations
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• Maintain a Balance between land use and transportation• Ensure pedestrian mobility throughout the TSAs• Bike Master Plan for County has been adopted and
includes the TSAs• An enhanced RIBS and Fairfax Connector service to
support rail• Strong Transportation Demand Management (TDM)
program in the TSAs
County of Fairfax, Virginia
Reston Phase I Plan AmendmentMajor Road Transportation Recommendations
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• An enhanced street network to increase connectivity– Developed by the Reston Task
Force• Soapstone Drive Overpass• Town Center Parkway
Underpass • South Lakes Drive Overpass• Grade Separate Fairfax
County Parkway/Sunrise Valley Drive
County of Fairfax, Virginia
Why a GridA grid of streets allows for more options when going from
point A to point B, reducing the demand on streets
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County of Fairfax, Virginia
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Reston Phase I Plan AmendmentGrid of Streets
County of Fairfax, Virginia
Reston Network Analysis
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Data Collection• Traffic
Counts in June 2015
• Travel Time Runs
Existing Conditions• Capacity
Analysis • Level of
Service
Test Grid of Streets (2030 & 2050)• Traffic
Forecasting Capacity Analysis
• Level of Service
Mitigation• Signal re-
timing• New links• Turn lanes• Additional
lanes
Roadway Classification• DRPT Design
Guidelines• Bike lanes• Sidewalks/
Pedestrian routes
• On-Street Parking
• Transit Routes
Finalize Grid of Streets (2030 & 2050) Based on:• Advisory
Group input• Stakeholder
input• Community
input
Phasing Analysis• Prioritizatio
n of larger projects
Network Analysis Project Process
Advisory Group input, Stakeholder input, Community input
County of Fairfax, Virginia
Transit Oriented Development• Mixed-use walkable
development around Metrorail Stations
• Supported by strong Transportation Demand Management (TDM) program• Enhanced pedestrian facilities• Increased transit ridership• More bike parking and access• Encourages carpooling• Teleworking
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Development2050 Peak Hour – Future Trips0 to ¼ Mile
¼ to ½ Mile
Beyond ½ Mile
Office 45% 40% 35%
Residential 45% 40% 25%Technological Advancement
7.5% 7.5% 7.5%
TDM Vehicle Trip Reduction Goals
Reductions based off of ITE Trip Generation Rates
County of Fairfax, Virginia
Evaluating the Grid• Level of Service and Delay at Intersections
• LOS E (55 – 80 seconds of delay) is the standard for the Reston Transit Station Areas
• VDOT and FCDOT have agreed on LOS E as the standard for the Reston Transit Station Areas
• Queue Length (number of cars waiting at a signal)• Walksheds – pedestrian accessibility• Enhanced connectivity for transit
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County of Fairfax, Virginia
Mitigation
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County of Fairfax, Virginia
Purpose of Mitigation• Mitigation reduces vehicle congestion • Mitigation reduces delays experienced at
intersections• Mitigation improves the reliability of travel times
through an area (for both buses and vehicles)• Mitigation will be the way we achieve LOS E in the
Transit Station Areas• We are using mitigation measures that have the
lowest impact
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County of Fairfax, Virginia
Mitigation Options• Mitigation Measures - Tiered Approach
– 1st Tier: No right of way (ROW) impact – 2nd Tier: Some right of way impact– 3rd Tier: Large scale mitigations if needed
– Consultation with Advisory Group, Stakeholders, and citizens
• Each grid link is initially assumed to be one lane in each direction
– No turn lanes were initially assumed at new intersections
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Additional coordination will be needed with VDOT on the location of turn lanes at signalized intersections
County of Fairfax, Virginia
2050 1st Tier Recommendations
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County of Fairfax, Virginia
2050 1st Tier Mitigation Measures
• No ROW Impact Mitigation Measures – Modifications to lane configurations– Signal timing and phasing optimization – All-way stop vs. two-way stop evaluation – Additional traffic signals
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County of Fairfax, Virginia
2050 1st Tier Signal Recommendations
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26 New Signalized Intersection LocationsSunrise Valley Dr. @ Wood Oak Dr. Sunrise Valley Dr. @ Commerce Park Dr. East
Sunrise Valley Dr. @ Colts Brook Dr. Soapstone Overpass @ Indian Ridge Rd. Extension
Frying Pan Rd. @ Greg Roy Ln. Sunset Hills Rd. @ West of Town Center Pkwy.
Monroe St. @ Future Connection to Herndon Metro Town Center Pkwy. @ North of Sunset Hills
Glade Dr. @ Pinecrest Rd. Town Center Pkwy. @ Market St.
South Lakes Dr. @ Pinecrest Rd. Sunset Hills Rd. @ Library St.
Sunrise Valley Dr. @ Pinecrest Rd. Extended Sunset Hills Rd. @ Soapstone Overpass
Sunrise Valley Dr. @ Town Center Pkwy. Sunset Hills Rd. @ East of Soapstone Overpass
Town Center Pkwy. @ North of Sunrise Valley Dr. Sunset Hills Rd. @ South Lakes Overpass
West of Reston Pkwy. with grid street Reston Station Blvd. @ Metro Center Dr.
Sunrise Valley Dr. @ Roland Clarke Place Reston Station Blvd. @ Michael Faraday Dr.
Sunrise Valley Dr. @ Indian Ridge Rd. Isaac Newton Square S. @ Isaac Newton Square W.
Sunrise Valley Dr. @ Commerce Park Dr. West Wiehle Ave. @ Isaac Newton Square N.
County of Fairfax, Virginia
• Unmitigated had 20 Problem Locations• 10 intersections with delay over 120 Seconds:
1. Centreville Road & Sunrise Valley Drive 2. Monroe Street & Fox Mill Road 3. Spring Street & Herndon Parkway 4. Fairfax County Parkway & Baron Cameron Avenue 5. Fairfax County Parkway & Sunrise Valley Drive6. Town Center Parkway & Sunset Hills Road7. Reston Parkway & Baron Cameron Avenue8. Reston Parkway & Bowman Towne Drive9. Reston Parkway & Sunrise Valley Drive 10.Reston Parkway & South Lakes Drive
Problem Locations After Tier 1 Mitigation
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County of Fairfax, Virginia
2050 2nd Tier Recommendations
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County of Fairfax, Virginia
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Mitigation Measures2nd Tier: Some Right of Way Impact
• Potential some ROW Mitigation Measures– Signals were added where needed– Turn lanes: left and right turn lanes– Additional through lane– Additional grid link
County of Fairfax, Virginia
2050 2nd Tier Recommendations
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New Signals • New Dominion Pkwy. & Library St.• Reston Station Blvd. & Soapstone Dr.• Bracknell Dr. & Stevenage Rd.• Reston Town Center West consolidated access
County of Fairfax, Virginia
2050 2nd Tier Intersection Control
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County of Fairfax, Virginia
2050 2nd Tier Recommendations
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Turn Lanes• Monroe St. & Frying Pan Rd./Fox Mill Rd. • Reston Pkwy. & Sunrise Valley Dr. • Sunset Hills Rd. &Town Center Pkwy. • Wiehle Ave. & Reston Station Blvd.• Wiehle Ave. & N Isaac Newton Sq.• Monroe St. & future connection to Herndon
Metro GarageAdditional coordination will be needed with VDOT on the
location of turn lanes at signalized intersections
County of Fairfax, Virginia
2050 2nd Tier RecommendationsNew Turn Lanes
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Wiehle Ave. & N. Isaac Newton Sq.- EB left turn lane & WB right turn lane
Tier 1 Tier 2
Wie
hle
Ave
.
N. Isaac Newton Sq.
Wie
hle
Ave
.
N. Isaac Newton Sq.
PM: 103 sec. PM: 65 sec.
County of Fairfax, Virginia
2050 2nd Tier RecommendationsTown of Herndon Comprehensive Plan Improvements
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Worldgate Dr. & Herndon Pkwy.
Monroe St. & Worldgate Dr.
Monroe St. & Herndon Pkwy.
Fairbrook Drive Extension Worldgate Drive Extension
New SignalsWorldgate Dr. Extension & Herndon Pkwy.
Herndon Pkwy. & Fairbrook Dr.
County of Fairfax, Virginia
2050 2nd Tier MitigationResults
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County of Fairfax, Virginia
2050 Problem Locations
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Intersections – 120+ Seconds of Delay
Intersections2050 Unmitigated After 2050
1st TierAfter 2050
2nd Tier20 10 7
With signal re-timings and the introduction of signals, there has been a reduction in the
projected number of intersections experiencing delays in excess of 120 seconds
County of Fairfax, Virginia
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2050 Unmitigated Problem Locations
County of Fairfax, Virginia
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2050 1st Tier Problem Locations
County of Fairfax, Virginia
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2050 2nd Tier Problem Locations
County of Fairfax, Virginia
2050 2nd Tier Problem Locations
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• Unmitigated had 20 Problem Locations• After 1st Tier: 10 Problem Locations• After 2nd Tier: 7 Problem Locations
– 6 are associated with identified follow-on tasks1. Fairfax County Parkway & Spring Street 2. Fairfax County Parkway & Sunrise Valley Drive3. Reston Parkway & Baron Cameron Avenue4. Reston Parkway & Bowman Towne Drive5. Reston Parkway & Sunrise Valley Drive 6. Reston Parkway & South Lakes Drive
County of Fairfax, Virginia
2050 2nd Tier Problem Locations
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Fairfax County Pkwy. & Spring St.
Reston Pkwy. Capacity Improvements
Fairfax County Pkwy. & Sunrise Valley Dr.
County of Fairfax, Virginia
3rd Tier Mitigation
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County of Fairfax, Virginia
Mitigation Measures3rd Tier: Alternative Intersection Treatment
• Median U-Turn/Superstreet– Eliminates left turn movement for side streets– Increases thru movement green time– Additional needed ROW to provide turn radius
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County of Fairfax, Virginia
Mitigation Measures3rd Tier: Large Mitigation Measures
• Underpass/Overpass– Provides for an uninterrupted thru movement
• Only done in close coordination with Advisory Group and Stakeholders after all other mitigation measures have not worked
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County of Fairfax, Virginia
Funding Plan
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County of Fairfax, Virginia
Funding Plan Overview• The plan focuses on how to best fund projects in the
Reston Transit Station Areas • Projects included in the plan are those recommended in
the Reston Phase I Plan Amendment • The plan will span 40 years (FY2015 - FY2054)• The plan will build on priorities identified as part of the
Network Analysis • The plan will determine funding allocation for projects
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County of Fairfax, Virginia
Reston Funding Plan Projects
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County of Fairfax, Virginia
Shared Funding Solution• Public and private investment in Reston is necessary to ensure
Reston’s future success. • Public funding means money from federal, state, local, and
regional sources.– Multiple sources from each type
• Private funding means money from the following sources:– Proffers from developers– Contributions to a Road Fund (per square foot/per dwelling unit)– In-kind Contributions– New Revenue Source (tax district, service district, etc.)
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County of Fairfax, Virginia
Building the Funding Plan• Discussion with Advisory Group• Prepared preliminary cost estimates for roadway,
intersection, and grid improvements• Potential revenue sources and funding mechanisms for
the plan• Individual project prioritization (Network Analysis Study)• Timing of funding needs
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County of Fairfax, Virginia
Building the Funding Plan Cont.• Viable funding strategies
– Amount of public and private responsibility for plan costs– Analysis of several funding scenarios that include use of a road
fund or a road fund in combination with a service or tax district over Reston TSAs, Reston, and/or Special Tax District 5
– Non-viable scenarios have been removed based on initial feedback include those that feature a service district over all of Reston or a service district over Special Tax District 5, which provide limited increases to support funding the plan
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County of Fairfax, Virginia
Next Steps• Identify Tier 3 Mitigation Measures for:
– Fairfax County Parkway & Sunrise Valley Drive– Fairfax County Parkway & Spring Street– Reston Parkway
» Intersection improvements from Baron Cameron Avenue to Lawyers Road
• Phasing Analysis– Based on Existing Conditions
• Advisory Group Meeting on Funding Plan
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County of Fairfax, Virginia
Schedule
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Task Description
1A Land Use and Networks - Task is Complete
1B Traffic Counts - Task is Complete
2A Establish Existing Conditions - Task is Complete
2B Calibrate Against Existing Conditions -Task is Complete
3A2 Analyze Future Conditions (2050) - Task complete advance to Tier 3 Mitigation
3A1 Analyze Future Conditions (2030)
3B Simulation of the Dulles Toll Road
3C Microsimulation - Optional
4A Meetings/Presentations
4B Additional Meetings/Presentations - Optional
5A Phasing Analysis - Existing Conditions
5B Phasing Analysis - 2050 - Optional
6 Determination of DRPT Guidelines Roadway Classification
7 Documentation
8 Reston Parkway Capacity Improvements
9 Fairfax County Parkway & Spring Street Interchange
10 Fairfax County Parkway & Sunrise Valley Drive
11 Rock Hill Bridge at Sunrise Valley Drive
12A Meetings/Presentations
12B Additional Meetings/Presentations - Optional
March 2016January 2016 February 2016 October 2016April 2016 May 2016 June 2016 July 2016 August 2016 September 2016
05/16/16
County of Fairfax, Virginia
Questions & Comments
For questions and comments about the study please contact:
Kristin Calkins: Kristin.Calkins@fairfaxcounty.gov(703) 877-5710
http://www.fairfaxcounty.gov/fcdot/restonnetworkanalysis/
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County of Fairfax, Virginia
2050 2nd Tier RecommendationsNew Turn Lanes (Cont.)
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Town Center Pkwy. & Sunset Hills Rd. - SB & NB left turn lanesTier 1 Tier 2
Tow
n C
ente
r P
kwy.
Sunset Hills Rd. Sunset Hills Rd.
Tow
n C
ente
r P
kwy.
AM: 106 sec.PM: 157 sec.
AM: 41 sec.PM: 40 sec.
County of Fairfax, Virginia
2050 2nd Tier RecommendationsNew Turn Lanes (Cont.)
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Wiehle Ave. & Reston Station Blvd.- WB left turn laneTier 1 Tier 2
Wie
hle
Ave.
Reston Station Blvd.
Wie
hle
Ave.
Reston Station Blvd.
AM WB approach: 121 sec.
AM WB approach: 60 sec.