Montgomery Street station is a combined BART and Muni Metro rapid transit subway station in the Market Street subway in downtown San Francisco. Located under Market Street between Montgomery Street and Sansome Street, it serves the Financial District neighborhood and surrounding areas. The three-level station has a large fare mezzanine level, with separate platform levels for Muni Metro and BART below. Montgomery Street and Embarcadero station to the north are typically the two busiest stations in the BART system.