Dulles Corridor Rapid Transit

Delon Hampton & Associates (DHA) provided program management services to include civil engineering design, inspection, and environmental impact assessments, as a subconsultant, for the Dulles Corridor Rapid Transit Phase 1 project. DHA developed and designed alternatives for the then planned Bus Rapid Transit (BRT) roadway facilities including acceleration and deceleration lanes in accordance with VDOT guidelines; designed rail alignment alternatives, using WMATA standards and guidelines; designed station site layouts, Kiss and Ride areas, short-term parking, and access roadways; performed pedestrian and vehicular site accessibility and on-site traffic circulation analyses; performed drainage studies that included stormwater detention, quality control, and preliminary grading; and prepared drawings for various submittals and presentations to outside agencies.

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The project evaluated several alternative transit system improvements extending along the 23-mile Dulles Corridor from the Orange Line near the West Falls Church Metrorail station to Ashburn, VA. The project was envisioned as a phased implementation of an extension to the Metrorail system. It began with the BRT alternative but evolved into designing an extension of WMATA's transit system. The new Metrorail extension (now called the Silver Line) was constructed in two major phases. The first phase opened five new Metrorail stations along the corridor in 2014. The second phase, now under construction, will complete the Metrorail extension to Dulles Airport and beyond in Loudoun County.