Muni Central Subway | Plans + Projects | Our Work

Muni Central Subway

On track to open in spring 2022, the San Francisco Municipal Transportation Agency (Muni) Central Subway project is a 1.7-mile extension of the T-Third light-rail line from the 4th and King/Caltrain station to Chinatown.

Central Subway boring machine head
Karl Nielsen
Tunnel boring machine "Mom Chung" sits patiently at the northern mouth of the tunnel she created, waiting to be dismantled.

MTC made the $1.57 billion Central Subway project a top regional priority in the nationwide competition for funding through the Federal Transit Administration’s New Starts program.

Four New Stations

The subway alignment includes four new stations:

  • 4th and Brannan (street level)
  • Yerba Buena/Moscone at 4th and Folsom streets (subway)
  • Union Square/Market Street on Stockton Street at Union Square (subway)
  • Chinatown at Stockton and Washington streets (subway)

Value to Our Communities

Completion of the project will:

  • Improve regional connections to BART, Caltrain and future high-speed rail
  • Increase transit capacity and relieve overcrowding
  • Improve travel times
  • Relieve congestion along the Stockton Street corridor
  • Reduce air and noise pollution
  • Stimulate economic activity along the 4th Street corridor south of Market Street

Visit the Central Subway website. Get current news and construction updates.



The Central Subway project received a total of $942 million through the Federal Transportation Administration’s New Starts program. Other funding partners include:

  • MTC
  • State of California
  • San Francisco County Transportation Authority
  • City and County of San Francisco

Completion of the Central Subway project will provide a direct rapid transit link between downtown and the Sunnydale, Visitacion Valley and Bayview neighborhoods in southeast San Francisco.

These neighborhoods will enjoy better access to jobs, stores, schools, and sporting and cultural venues in downtown San Francisco, Chinatown, South of Market and Mission Bay.

Muni forecasts:

Daily ridership along the T-Third light-rail by 2019: 43,700

By 2030: 65,000

More than half of these riders will be along the Central Subway segment of the route.