AeroTrain is a 3.78-mile (6.08 km) underground people mover system at Washington Dulles International Airport in Dulles Virginia. It was scheduled to open in fall 2009 but was delayed until 2010 in order to complete reliability tests. It opened to Dulles employees on January 20 2010 and opened to passengers January 26 2010. The system mostly replaced the mobile lounges that transport passengers from the concourses to the Main Terminal.
