The first of several weekend stoppages of BART service between stations in Union City and Fremont will begin Saturday.
BART crews will be working in the trackway near the Fremont station to replace aging infrastructure.
The work will require shutdowns of train service between the Union City and Warm Springs/South Fremont stations. BART's Green Line will also fully shut down.
Bus shuttles will be provided to transfer passengers directly between these stations. Other shuttles will make an additional stop at the Fremont station.
BART said passengers taking buses should expect delays of 30 to 40 minutes.
The Orange Line will continue to run at all stations except between Union City and Warm Springs/South Fremont stations, where the bus shuttles will replace train service.
Riders using the bus shuttles and heading for San Francisco should plan to transfer from an Orange Line train to a Blue Line train at Bay Fair station. Blue, Red, and Yellow lines will run normally.
The same closures will be in effect for subsequent weekends on August 15 to 16, August 29 to 30, September 12 to 13, and September 26 to 27.
