San Francisco Municipal Railway (or MUNI) is the public transit agency that runs buses, cable car, and subway service in the city of San Francisco, California. MUNI runs diesel and trolleybuses that run throughout San Francisco, three Cable Car lines that run through the Financial District and Chinatown (with service to Fisherman's Wharf) and the Market Street surface, seven light rail lines that run below Market Street and two Historic Streetcar lines.
Muni operates forty-four local bus routes; two are operated during weekday peak hours. A number of routes have different terminals during evenings and/or weekends. Some routes also operate short turn route services during peak hours to deal with crowding on buses.
Rapid lines have an R following their route number. Muni operates five Rapid bus routes. The Rapid routes largely follow the route of the local buses but have fewer stops on the corridor.
Express lines have an X, AX, or BX following their route number. Muni operates twelve express bus routes. Most of the express routes run on highways and on one-way traffic. These express routes also operate during peak hours.
Muni operates fourteen owl routes. Owl routes are operated at midnight. Some local daytime routes are shortened during owl service. And some owl routes also cover big or small parts of daytime bus routes.
Muni operates seven light rail lines and has its own subway tunnel underneath Market Street. Each of these routes is named with a letter instead of a number.
