Pedestrian Bridge Completed at Dulles Rail Project
The Bechtel-led team building the Dulles Metrorail Project has completed the installation of the pedestrian bridge that will give travelers access to the Wiehle-Reston East Station on the new Silver Line.
This bridge crosses 12 lanes of highways, including the Dulles International Airport Access Highway. Crews carried out the installation over a five-night period to limit disruption to motorists.
The construction and installation of the bridge were done in phases. Large segments of the bridge were built at one location and trucked to a staging area near the station where they were prepared for installation. The assembled sections were then mounted onto a customized self-propelled modular trailer (SPMT) system, which lifted the sections to the height of the bridge.
An operator, handling the computer that guides the transport, essentially “walked” the sections into place to form the bridge over the road.
The same method, customized for each location, is being used to install all of the Silver Line pedestrian bridges. Bechtel is building Phase 1 of the new rail line for the Metropolitan Washington Airports Authority. The project is currently on schedule for completion in late 2013.