Anyone who has passed through Dulles Airport recently knows it seems like half construction site and half airport these days. With construction of an airport rail system and other changes well under way, passengers have to pass around temporary walls in the terminal and the moon rovers skirt fenced construction sites scattered across the tarmac.

The airport hasn’t exactly been wowing passengers recently: In January, Dulles rated near the bottom of a list of medium sized airports for customer service, and in December the Financial Times’ Jurek Martin likened it to a “Third World hell hole.” Luckily for passengers the $3 billion Dulles Development (“d2”) project, which could alleviate some of those complaints, is over halfway completed. The improvements currently under construction include an airport train system to replace the mobile loungers, a new underground security area, new traffic control tower (seen here last fall in this airport photo), and construction of two addition runways. Already completed is the reconstruction of an existing runway, a pedestrian tunnel to Concourse B.