This approximately 17-mile (27 km) long north–south running road is mostly a four-lane (a few parts are two lanes), but heavily traveled, connection between State Route 7 and Prince William County.

The southern terminus is State Route 234 just past the Loudoun-Prince William County border.

The speed limit remains 45 mph (72 km/h) south of Arcola on Gum Spring Road all the way to Route 234.

The road has been scheduled for improvements under the Loudoun County Countywide Transportation Plan.

Additionally, a stretch south of U.S. Route 50 to Marbury Estates Drive has also been widened to four lanes.