Washingtonian predicts that these six transportation projects will totally change Washington, D.C. within the next few decades The projects include a parking lot under the National Mall, gondolas in Georgetown, various extensions and new additions to the Metrorail, an additional 10,500 feet of tarmac at Dulles Airport, a complete overhaul of Union Station, and a new bridge to alleviate congestion on the American Legion Bridge. [Wash; previously]