1

Project 8Woodrow Wilson Bridge Replacement

Washington, DC

2

Woodrow Wilson Bridge Part of I-495 Capital Beltway Long term DC area bottleneck

Source: Transportation Research Record 1900

Issues Volumes 2½ times design

Congestion, delays

I-495 bottleneck

Public opposition to early designs Environmental

Historic

Should accommodate future rail

Visual barrier

Residential displacement

Navigable channel clearance

Economic viability of adjacent business during construction

3

4

Project Replace/widen bridge to 12 lanes plus

8 general purpose 2 merge/diverge 2 express

+ 2 future HOV or rail transit 14 foot ped/bike way (on one bridge)

+ Scenic overlook areas

Improve adjacent interchanges

5

CSS Approach Coordination Committee (CC) to establish process

Elected local, regional, federal officials

Citizen work groups Stakeholder participation panels (SPP)

SPP recommendations to CC

Notable achievements Design features Environmental mitigation Historic preservation Management practices

Source: http://www.wilsonbridge.com

Design

6

Source: Google Earth

Design

7West (left) and east approaches and interchanges. Source: Google Earth

Design

8Source: http://www.wilsonbridge.com

CSS Design Features Architectural concept compatible

with other Potomac bridges Future rail transitway Pedestrian/bike way Pedestrian lighting Scenic overlooks Environmental features (partial)

Over 100 acres new wetlands Over 100 acres riparian forest

preserved or created Aquatic vegetation Dredged material used to reclaim

strip mine Fish passageways in nearby

creeks9Source: http://www.wilsonbridge.com