Post on 15-Apr-2017
County of Fairfax, Virginia
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Design Public Hearing Presentation for:
Wiehle Avenue at W&OD Trail
March 17, 2016
County of Fairfax, Virginia
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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
County of Fairfax, Virginia
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Existing Conditions
Department of Transportation
• 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
County of Fairfax, Virginia
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Safety Concerns
Department of Transportation
• 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?
County of Fairfax, Virginia
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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
Department of Transportation
County of Fairfax, Virginia
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Dominion Virginia Power (DVP)
Department of Transportation
Single-Circuit 230 kV Monopoles Double-Circuit 230 kV Towers
County of Fairfax, Virginia
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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
Department of Transportation
County of Fairfax, Virginia
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Underground Utilities
Department of Transportation
Water Gas Electric AT&T, Cox, Comcast, Verizon, L3, Zayo
County of Fairfax, Virginia
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Proposed Trail Alignment
Department of Transportation
• 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
County of Fairfax, Virginia
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Design Details
Department of Transportation
• 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
County of Fairfax, Virginia
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Typical Section
Department of Transportation
Trails merge to meet DVP structure width requirements
County of Fairfax, Virginia
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Bridge Typical Section
Department of Transportation
County of Fairfax, Virginia
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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
Department of Transportation
County of Fairfax, Virginia
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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
Department of Transportation
County of Fairfax, Virginia
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Requested Feedback• Bridge Type/Finish• Retaining Wall Formliner Finish• Medallion• Other
Department of Transportation
County of Fairfax, Virginia
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Prestressed Concrete
Department of Transportation
County of Fairfax, Virginia
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Steel Girder
Department of Transportation
County of Fairfax, Virginia
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Truss
Department of Transportation
County of Fairfax, Virginia
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Truss
Department of Transportation
County of Fairfax, Virginia
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• Retaining Wall Formliner Finish
• Medallions
Aesthetic Options
Department of Transportation
County of Fairfax, Virginia
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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
Department of Transportation
County of Fairfax, Virginia
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Questions
Department of Transportation