S Shuttle

Not to be confused with S (New York City Subway service).

The S Shuttle is a light rail line in the Muni Metro system in San Francisco, California. It runs through the entire Market Street subway and Twin Peaks Tunnel.

S Shuttle
A 2-Car S Shuttle train at Embarcadero station in 2017.
Overview
Owner	San Francisco Municipal Transportation Agency
Locale	San Francisco, California
Termini	Embarcadero station West Portal station
Stations	9
Service
Type	Light rail
System	Muni Metro
Operator(s)	San Francisco Municipal Railway
History
Opened	April 2, 2001 (2001-04-02)
Technical
Track gauge	4 ft 8 1⁄2 in (1,435 mm) (standard gauge)
Electrification	Overhead lines, 600 V DC
Route diagram Legend | | Embarcadero Montgomery Union Square/​Market Street (2022) Powell Civic Center Van Ness to Ocean Beach to Balboa Park Church Castro to surface tracks on Market Street (closed 1982) Eureka Valley closed 1972 Twin Peaks Forest Hill West Portal to SF Zoo to Balboa Park This diagram: view talk edit

History

An S Shuttle train crossing over near West Portal station in 2017.

Muni introduced the S Castro Shuttle. This aimed to reduce crowding at the busy Castro station. The service began on April 2, 2001. At this time it was running only at peak hours on weekdays.^[1] It was discontinued in 2007 when the T Third Street line was opened. Service went further to St. Francis Circle station in 2013, but cut back to West Portal station in 2016.

Service changes

A lot of service changes took place with the start of full service on the T Third Street line on April 7, 2007. The new line was routed through the subway to Castro station. It replaced the S Castro Shuttle; changes were also made to the J Church, N Judah, and several bus lines.^[2] The changes were unpopular with the public; the Muni Metro changes caused big delays in the Market Street subway, and forced many users to transfer to reach the Caltrain station when they did not back then.

Reversing changes

On June 30, 2007, Muni reversed some of the changes. The J, N, and S were restored to their previous routes. And the T was combined with the K Ingleside line.^[3][4][5]