Market Street subway

Market Street subway
Muni Metro tunnel east of Castro station
Overview
Owner	San Francisco Bay Area Rapid Transit District
Locale	Market Street, San Francisco, California
Termini	Embarcadero station Castro station
Stations	7
Service
Type	Rapid transit and Light rail/Streetcar
System	BART, Muni Metro
History
Opened	BART: November 5, 1973 Muni Metro: February 18, 1980
Technical
Character	Two level cut-and-cover rapid transit and light rail tunnel
Track gauge	BART: 5 ft 6 in (1,676 mm) Muni Metro: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Electrification	BART: Third rail, 1 kV DC Muni Metro: Overhead line, 600 V DC
Route map Show interactive map Legend BART to East Bay Transbay Tube under San Francisco Bay Ferry Building Embarcadero (Ferry) Portal Embarcadero Montgomery Central Subway Union Sq/ Market St │ Powell Civic Center/​UN Plaza BART to Millbrae & SFO Van Ness Duboce Portal Church Castro to Twin Peaks Tunnel This diagram: view talk edit Show diagram map

The Market Street subway is a two-level subway tunnel that carries Muni Metro and BART trains under Market Street in San Francisco, California.^[1][2] It runs under the length of Market Street between Embarcadero station and Castro station. The upper level is used by Muni Metro lines and the lower level is used by BART lines. BART does not run through the whole subway; it turns south and runs under Mission Street southwest of Civic Center/UN Plaza station. The northeastern end of the BART level is connected to the Transbay Tube. On the Muni Metro level, the southwestern end of the Market Street subway connects to the much-older Twin Peaks Tunnel, and the northeastern end connects to surface tracks along the Embarcadero.