High Quality Content by WIKIPEDIA articles! The Dulles Corridor Metrorail Project, formally dubbed the Silver Line, is an extension of the Washington Metro rapid transit system, currently under construction with the goal of providing rapid transit service to Dulles International Airport and Tysons Corner. The line consists of 34 stations from Route 772 in Loudoun County, Virginia, to Largo Town Center in Largo, Maryland, US. The current plan calls for stations in Loudoun, Fairfax, and Arlington counties in Virginia, the District of Columbia and Prince George`s County, Maryland. Eighteen stations will be shared with the Orange Line, including all thirteen shared between the Orange and Blue Lines from Rosslyn to Stadium–Armory. Trains would continue through five stations on Blue Line track to Largo Town Center.