Clarendon Circle Transportation Study

Updated March 2012

Prepared By Toole Design Group andArlington County DES, Division of Transportation

A Multimodal Study of Clarendon Circleand Surrounding Intersections

Project Goals

• Implement the Clarendon Sector Plan• Improve pedestrian and bicycle

safety and access• Normalize the intersection geometry• Maintain or improve traffic flow• Reduce pavement area / intersection

size• Improve traffic control (signals,

signing, markings) and lighting

Key Existing Issues

Sector PlanAnalysis

Existing Traffic ConditionsAnalysis for 2015 AM/PM peak Level of Service

3 Concepts for Lane Configurations

• Concept 1 (Existing Lanes) – Keep existing lane configuration onWashington Boulevard: keep existing westbound left turn lane.Level of Service AM/PM = C/C

• Concept 2 (Four Lanes) – Four lanes on Washington Boulevard: Removewestbound left turn lane.Level of Service AM/PM = D/D

• Concept 3 (Five Lanes) – Five lanes on Washington Boulevard: Addeastbound left turn lane.Level of Service AM/PM = B/C

Lane Configuration 1 (Existing Lanes)

Existing lanes onWashington Blvd

Lane Configuration 2 (Four Lanes)

Four lanes on WashingtonBlvd

(Remove dedicated left laneand create a thru/left lane)

Lane Configuration 3 (Five Lanes)

Five lanes onWashington Blvd

(add turn lane)

3 Alternatives to Improve Wilson Blvd Alignment

• Alternate A– Push towards diner property

• Alternate B – shift within intersection andreduce footprint

• Alternate C – push towards memorial north ofintersection

These alternatives work with the Concepts 1,2, and 3 (previously viewed)

Wilson Boulevard Alignment OptionsAlternate A

push towards dinerproperty

Wilson Boulevard Alignment OptionsAlternate B

shift within intersectionand reduce footprint

Wilson Boulevard Alignment OptionsAlternate C

Push towardsmemorial

Concepts Comparison MatrixWhich combination of concept and alignment best meet thegoals of the project?

Proposed Design Alternative 2B

• Tightest intersection geometry• Realigns Washington Boulevard and Wilson Boulevard• Washington Blvd as a 4-lane cross section (removes the

westbound left turn lane)• Widens/adds medians• Removes slip lane at the Olmstead Building• Closes N. Irving Street north of intersection• Adds curb extensions at Liberty Tavern and Sam’s Deli• Adds bike lanes to improve bike connections• Widens crosswalks and shortens crossing distances• Improve sight lines and visibility

Potential best option based on Design Study results and meeting the goals of the project

Potential best option based on Design Study results and meeting the goals of the project

Proposed Design Alternative 2B

Future Build-out Opportunities

Add parking

Widened sidewalksand bike lanes

Potentialwidermedian

View looking south on Washington Boulevard from NE Corner (old Petco site)

Old Petco Building Corner

Silver Diner Corner

Illustrations of Proposed Improvements

View looking south on Washington Boulevard

Sam’s Deli Corner Old Petco Building Corner

Silver Diner Corner

Illustrations of Proposed Improvements

Illustrations of Proposed ImprovementsView looking West on Wilson Blvd

Liberty Tavern Corner

Wells Fargo bank Corner Olmstead Building Corner

View looking west on Wilson Boulevard

Liberty Tavern / Sam’s Deli CornerClarendon Central Park / monument corner

Illustrations of Proposed Improvements

Encourage westbound Wilson Blvd traffic to use 10th Street

Discourage westbound Wilson Blvd traffic from going through Clarendon Circle

Lengthen and improve dedicated left turn lane to add capacity and improve flow.

Proposed additional changes to improve westbound Wilson Blvd traffic flow through Clarendon10th Street and Wilson Blvd Intersection Improvements

10th Street and Wilson Blvd Intersection ImprovementsProposed Additional Changes to Improve West bound Wilson Blvd traffic flow through Clarendon.

A longer left turn lane will add capacity and improve flow. Proposed improvements willbe coordinated with sidewalk, signal and other pedestrian safety improvements.

The Development Project Garfield Park will be lengthening the left turn pocket to betteraccommodate AM peak turns on to 10th Street.

Changes to 10th Street and Washington Blvd Intersection

Left Turn Pocket Extension

Illustration of extension of left turn pocketChanges to 10th Street and Washington Blvd Intersection

Left Turn Pocket Extension

Encourage westbound Washington Blvd traffic to use 10th Street

Discourage Washington Blvd traffic from using 9th Street.

Potential locations for street improvements.

Potential changes to 9th Street could reduce cut through trafficLyon Park Neighborhood Streets

Next Steps:

• Present Conceptual Design (25% Plans) to Manager’s Office, County Board membersand Commissions.

• Launch project web page in January 2012.• Schedule public forums to include Clarendon Alliance and surrounding civic

associations – January–May 2012.• Meet with adjacent business owners.• Prepare 50% engineering plans.• Begin real estate appraisals/impacts (limited).• Schedule second round of public meetings to focus on project details, sidewalk

paving patterns, streetlights, Petco site amenities etc.• Provide second update to Manager’s Office, County Board and Commissions with

90% engineering plans.• Finalize plans and prepare construction bid package/schedule construction.• Goal: Begin construction in 2014 or sooner.

• Web Page Link: http://www.arlingtonva.us/departments/environmentalservices/dot/page84699.aspx

End of Presentation

Arlington Project Manager:: Tom Hutchings 703 228-3809 Thutchings@arlingtonva.us