The Manassas Line is a Virginia Railway Express commuter rail service that extends from Washington, D.C. to Bristow, Virginia. The first of VRE's two lines, with service beginning on June 22, 1992, the line operates on tracks owned by CSX Transportation and Norfolk Southern Railway.

Virginia Railway Express (VRE) is a commuter rail service that connects outlying small cities of Northern Virginia to Union Station in Washington, D.C. It operates two lines which run during weekday rush hour only: the Fredericksburg Line from Spotsylvania, Virginia, and the Manassas Line from Broad Run station in Bristow, Virginia. In 2023, the system had a ridership of 1,537,000, or about 5,900 per weekday as of the fourth quarter of 2023.