Phase 1 workers assemble direct fixation track and switch construction on Route 7 aerial guideway west of the Springhill Station. (Photo courtesy of Stephen Barna/Dulles Corridor Metrorail Project)
Concrete Plinths for DF Track
Phase 1 workers assemble direct fixation track and switch construction on Route 7 aerial guideway west of the Springhill Station. (Photo courtesy of Stephen Barna/Dulles Corridor Metrorail Project)