The Automated People Mover (APM) System is part of the Dulles Development (D2) Program. The APM is set up to connect the airport terminals. The D2 scheme included a total of approximately 4 miles (6.4 kilometers) of APM tunnels and four new stations at terminal nodes along with tug and utility tunnels, a pedestrian tunnel and at-grade vehicle maintenance facility.
Automated People Mover Construction, Inspection, and Management Services:
Gall Zeidler Consultants provided initial peer review and subsequent construction management services for the IAD APM System. These services included design review and construction inspection related to the underground aspects of the work, New Austrian Tunneling Method / Tunnel Boring Machine (NATM / TBM) tunnel excavation and support, instrumentation and monitoring, waterproofing, support of excavation for cut-and-cover construction for station and line tunnels and the installation of electrical and mechanical systems for the facilities.