A rendering of Chinatown station


The Central Subway will extend the Muni T-Third line north from Fourth and King streets to Chinatown. The subway is expected to carry nearly 73,000 passengers a day. The project aims to provide shorter travel times for passengers and relieve congestion on the Stockton Street corridor. 

When the Central Subway is complete, trains will travel mostly underground from the 4th Street Caltrain Station to Chinatown, bypassing heavy traffic on congested 4th Street and Stockton Street. 

The four new train stations include:  

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

The SFMTA is leading this project. 

July 2017 Construction Update

Cost and Funding

The total cost of the Central Subway project is about $1.6 billion. The Transportation Authority has contributed about $215 million in Prop K half-cent local transportation sales tax funds, State Transportation Improvement Program funds, and other funds to the project. 

Timeline and Status

The Central Subway project is under construction and is expected to be ready for service in Spring 2022. 


SFMTA project webpage



Eric Cordoba, Deputy Director for Capital Projects

Related programs

San Francisco's voter-approved Transit-First Policy states that decisions regarding the use of our public streets and sidewalks shall prioritize public rights of way for pedestrians, bicyclists, and public transit.