It was the first bus rapid transit line to open in Virginia and in the Washington metropolitan area.

The service runs along a bus-only roadway along Richmond Highway (U.S. Route 1) in Alexandria between Potomac and East Glebe stations, as well as a busway in Arlington.

[4] Metroway operates seven days a week with longer hours and more frequent service during weekdays.

The 33rd & Crystal stop offers two-way service, while Pentagon City, the new northern terminus, is southbound-only.

[8] Beginning May 25, 2019, as a result of the Blue and Yellow Lines being shut down south of National Airport for the summer, new stops were added on Potomac Avenue at East Glebe Road near the Kaiser Permanente and the National Institute for the Blind (NIB) Headquarters.