Design Public Hearing Presentation for Wiehle Avenue at W&OD Trail

County of Fairfax, Virginia

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Design Public Hearing Presentation for:

Wiehle Avenue at W&OD Trail

March 17, 2016


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Location Map

Department of Transportation

WIE

HLE

AVE

NU

E

TO D

ULL

ES

TOLL

RO

AD

PROJECT SITE N

SUNSET HILLS ROAD

WIEHLE-RESTON METRO STATION

ISSA

C

NEW

TON

SQ

MIC

HAE

L FA

RAD

AY C

TW&ODTRAIL


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Existing Conditions


• W&OD Trail – 10 ft. wide paved asphalt trail– 10 ft. wide gravel/dirt trail

• Wiehle Ave (Urban Arterial)– 24,000 AADT– 2 NB lanes, grass median, 4

SB lanes• At-Grade Crossing

– Crosswalk (75’ L x 40’ W)– Pedestrian/Bicycle Signs


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Safety Concerns


• Crash Data– 7 reported crashes from

June 2011 to June 2015 • Crash Types

– Vehicle vs. Vehicle– Vehicle vs. Trail User

• Different Behaviors– Cautious– Confused– Oblivious– Careless

Is she really going?

Are they going to stop?


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• Safety Improvements– Eliminate conflicts between vehicles and trail users– Minimize vehicle rear-end crashes

• Free-Flow Traffic– Alleviate sudden stops for vehicles traveling through

intersection– Provide an uninterrupted route for trail users

• Public Enhancement– Present viable options to the local community for their

input– Adhere to the aesthetics and history of W&OD Trail

Purpose & Need



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Dominion Virginia Power (DVP)


Single-Circuit 230 kV Monopoles Double-Circuit 230 kV Towers


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DVP Electrical Lines• Initial Relocation Plan

– 5 to 6 concrete monopoles– 15 ft. south (CL of poles)

• Guidelines for Design– 25 ft. from conductor lines– 25 ft. workspace around

poles– 20 ft. through access for

maintenance vehicles– 18 ft. maximum width for

structures

• Ongoing Coordination



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Underground Utilities


Water Gas Electric AT&T, Cox, Comcast, Verizon, L3, Zayo


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Proposed Trail Alignment


• Grade separate W&OD Trail over Wiehle Avenue

• Merging paved trail with gravel trail for bridge crossing

• W&OD Trail Profile– 3% vertical grade vs. 5% vertical grade


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Design Details


• Access to Wiehle Avenue will be provided• At-grade trail crossing at Wiehle Avenue

will be CLOSED• Widen sidewalk along Wiehle Avenue• Designed to follow DVP offset guidelines


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Typical Section


Trails merge to meet DVP structure width requirements


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Bridge Typical Section



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Ongoing StudiesVertical Grade

• 3% Vertical Grade– Preferred grade per NVRPA– Easier ride for bicyclists– Bigger project footprint– More impacts and higher costs

• 5% Vertical Grade– Allowable grade per AASHTO– Harder ride for bicyclists– Smaller project footprint– Less impacts and lower costs

• 4% Vertical Grade?

Other Items• Wiehle Avenue Connection

– Prohibit mid-block crossing– Evaluate crosswalk just north of

Sunset Hills Road• Trail Merging

– Unite paved and gravel trails before bridge

– Provide signing to trail users• Drainage/SWM

– Provide closed drainage system to collect storm runoff

– Consider water quality and quantity



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Maintenance of Traffic

Wiehle Avenue• Road and Bridge

– Temporary traffic controls – Off-peak hours

• Midday• Nighttime

• Adjacent Sidewalk– Bypass Options– Detour Options

W&OD Trail• Gravel Trail

– Permanent controls– Prohibit use

• Paved Trail Open– Leave open– Safe from work areas



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Requested Feedback• Bridge Type/Finish• Retaining Wall Formliner Finish• Medallion• Other



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Prestressed Concrete



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Steel Girder



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Truss



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Truss



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• Retaining Wall Formliner Finish

• Medallions

Aesthetic Options



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Anticipated Schedule• Public Hearing – Winter 2016• Environmental – Winter 2016• Land Acquisition – Spring 2018• Final Design – Winter 2018• Utility Relocation – Summer 2019• Construction – Winter 2021



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Questions


Design Public Hearing Presentation for Wiehle Avenue at W&OD Trail

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