Powell Street station is a combined BART and Muni Metro rapid transit station in the Market Street subway in downtown San Francisco. Located under Market Street between 4th Street and 5th 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. The station is served by the BART Red, Yellow, Green, and Blue lines, and the Muni Metro J Church, K Ingleside, L Taraval, M Ocean View, N Judah, and S Shuttle lines.

The Green Line is a Bay Area Rapid Transit (BART) line in the San Francisco Bay Area that runs between Berryessa/North San José station and Daly City station. It has 22 stations in San Jose, Milpitas, Fremont, Union City, Hayward, San Leandro, Oakland, San Francisco, and Daly City. The line shares tracks with the four other primary BART services.