Washington Dulles International Airport Tunnel

Washington, D.C.

Tunnel, transit, airport and negotiation experience deliver project

•    Loop design allows APMs to link airport terminals, concourses
•    Some tunnels accommodate pedestrians and various airport operations
•    P3 leads to airport rail-service extension

The Metropolitan Washington Airports Authority selected HNTB to design a loop tunnel system that allows automated people movers to link all the airport’s terminals and concourses. 

The 10-mile, multitunnel project also accommodates a new baggage handling system, underground tugs, utilities, pedestrians and maintenance. 

HNTB led negotiation of the public-private partnership that extended the Washington, D.C., rail system to the Dulles Airport. The extension is part of a Washington Dulles improvement program designed to accommodate the region’s growing air travel needs.