Heavy Construction Contractors Association Recognizes WRA.
This $42 million project, located in Tysons Corner, Fairfax County, Virginia, improved the existing twin bridges carrying Route 7 over the Dulles Toll Road (DTR) and Dulles International Airport Access Highway (DIAAH). Each bridge carries two lanes of through traffic and one auxiliary lane and has a concrete sidewalk. The bridges were widened to accommodate 14 foot shared use paths on each side and to accommodate collector-distributor lanes under the end spans for the future Tysons Ramps project. The existing superstructure was replaced, widened and raised to provide the 16’- 6” vertical clearance over the DTR and DIAAH. The existing abutments were replaced using low overhead top down construction methods and the existing piers were rehabilitated. Route 7 was widened to a six-lane facility within the limits of the Project to match the section that was constructed previously. Improvements to the existing interchange ramps were limited to what was needed to tie in the widened Route 7 and bridge sections. Shared use paths were provided on both sides of Route 7 to ensure continuous pedestrian and bicycle movement through the interchange. These paths significantly improve the safety for the pedestrians and bicyclists in this area since all but one path go under or over the interchange ramps to reduce all at grade crossings.
