SR 9 has been the subject of considerable debate. West Virginia has converted its Route 9 to a four-lane highway to U.S. Route 340 in Charles Town. The expressway ends at the Virginia state line, raising concerns in Loudoun County about increasing traffic along the road's narrow, winding stretch through the town of Hillsboro. A bypass of Hillsboro was last proposed in 2008 and eventually removed from the county's draft 2010 transportation plan after protracted debate. A significant physical obstacle is that the town completely fills Hillsboro Gap, making any in-place widening impossible and requiring any separate bypass to go over or through Short Hill Mountain.