San Francisco Tunnel Work

Caltrain is performing work on the four train tunnels in San Francisco to pave the way for Caltrain Electrification and to bring the tracks to a state of good repair.

As of September 2019, crews have created additional clearance and installed anchor bolts in the tunnel ceilings to facilitate the installation of the overhead contact system that will power the new electric trains. Crews have also completed track and drainage work in the tunnels to ensure the system is in a state of good repair.

Beginning in February 2020, crews will reconstruct the southernmost tunnel entrance and install the overhead contact system (conductor rail and wires) inside the tunnels.

The majority of this work will be performed during weekends between February 22 and March 29. This will require the closure of Caltrain stations north of Bayshore Station. Supplemental bus service will be provided to 22nd and San Francisco stations during the closures. For more information on Caltrain Weekend Closures and alternative transit options, please visit

Due to the nature of the construction, there may be temporary, localized noise impacts during construction activities. Crews will be working around the clock on weekends and during the night on weekdays.

San Francisco Caltrain Tunnels Map

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