The Columbia Pike–Pentagon City Line, designated as Routes 16G & 16H, were daily bus routes that was operated by the Washington Metropolitan Area Transit Authority between the neighborhoods of Arlington Mill (16G) or Skyline City (16H) and Pentagon City station of the Yellow and Blue lines of the Washington Metro. This line is part of the Pike Ride service, which runs through Columbia Pike. This line provides service through the neighborhoods of Fairfax County and Arlington County to Pentagon City. Unlike the Columbia Pike Line, the Columbia Pike–Pentagon City Line does not serve Columbia Pike past the Arlington County line.

The Barcroft–South Fairlington Line, designated as Route 22A, Route 22C, or Route 22F, is a daily bus route operated by the Washington Metropolitan Area Transit Authority between Ballston–MU station of the Orange and Silver lines of the Washington Metro or Skyline City (22F) and Pentagon station of the Yellow and Blue lines of the Washington Metro. The 22 Line trips are roughly 20 minutes during peak hours, 30 minutes during off peak, and 60 minutes on weekends. This line provides service to Ballston or Skyline City and the Pentagon Transit Center from the neighborhoods of Arlington County, Fairfax County and Alexandria.