Washington, D.C.6 lines
- RDRed LineShady Grove – Glenmont · 27 stations
- OROrange LineVienna – New Carrollton · 26 stations
- BLBlue LineFranconia-Springfield – Downtown Largo · 28 stations
- SVSilver LineAshburn – Downtown Largo · 34 stations
- YLYellow LineHuntington – Mount Vernon Square · 13 stations
- GRGreen LineBranch Avenue – Greenbelt · 21 stations