U.S. Federal Route 29 is an east-west highway in Northern Arlington County. This runs from the Francis Scott Key Bridge, at the Washington D.C./Virginia Line, in Arlington, to the Fairfax/Arlington County Line, near Falls Church. U.S. Rt. 29 passes through the following towns in Arlington County. Rossyln Lyon Village Cherrydale East Falls Church U.S. Rt. 29 is not multi-plexed in Arlington County. U.S. Rt. 29 intersects the following highways in Arlington County. Interstate 66, at Rossyln. Virginia State Route 124, near Lyon Village. Interstate 66, near Cherrydale. Virginia State Route 309, near Cherrydale. Virginia State Route 120, near Cherrydale. Interstate 66, near East Falls Church.