The S Shuttle is a light rail service on the Muni Metro system in San Francisco, California. The service began in 2001 as the S Castro Shuttle, an effort to reduce crowding at Castro station. It was briefly discontinued in 2007 when the T Third Street line was opened. Service was extended to St. Francis Circle station in 2013, but cut back to West Portal station in 2016. In 2020, it was changed to full-time service as part of a reconfiguration of Muni Metro service.
An S Shuttle train at Embarcadero station in 2017
S Castro Shuttle rollsign on a game-day extra train in 2007.
An S Shuttle train crossing over near West Portal station in 2017.
Muni Metro is a semi-metro system serving San Francisco, California, United States. Operated by the San Francisco Municipal Railway (Muni), a part of the San Francisco Municipal Transportation Agency (SFMTA), Muni's light rail lines saw an average of 75,500 boardings per day as of the fourth quarter of 2023 and a total of 24,324,600 boardings in 2023, making it the sixth-busiest light rail system in the United States.
An inbound T Third Street train at Castro station in 2013
An inbound N Judah train at 48th Avenue in 2019
An outbound L Taraval PCC entering the (now demolished) eastern portal of the Twin Peaks Tunnel – the original Muni subway segment, February 1967
K Ingleside USSLRV passes an M Ocean View PCC at West Portal, November 1980
