 In 1932, the rest of the road to Gilberts Corner, now State Route 705 and U.S. Route 15 north of Catharpin, was added to the state highway system.SR 709 became State Route 234 in the 1933 renumbering, as did State Route 721 (Brunswick, Maryland to south of Purcellville, now State Route 287 and part of State Route 690).The gap from U.S. Route 50 at Aldie (west of Gilberts Corner) northwest to Philomont on State Route 734 and then north towards Purcellville on SR 690 was never filled.