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Caltrans to close one bore of Caldecott Tunnel for maintenance

By Rick Hurd, Bay Area News Group The Tribune Content Agency
OAKLAND, CALIFORNIA - OCTOBER 8: A lone vehicle rides along Highway 24 Caldecott tunnel in Oakland, Calif., on Tuesday, Oct. 8, 2019. CalTrans was planning to close the Caldecott tunnels but PG&E will install 4 generators inside the tunnels according to CalTrans. (Ray Chavez/Bay Area News Group)
OAKLAND, CALIFORNIA - OCTOBER 8: A lone vehicle rides along Highway 24 Caldecott tunnel in Oakland, Calif., on Tuesday, Oct. 8, 2019. CalTrans was planning to close the Caldecott tunnels but PG&E will install 4 generators inside the tunnels according to CalTrans. (Ray Chavez/Bay Area News Group) Ray Chavez TNS

Maintenance work on the Caldecott Tunnel will cause Caltrans to close the second bore of the tunnel going eastbound Tuesday night into Wednesday morning.

The tunnel on Highway 24 will be closed at 10 p.m. and re-open at 4:30 a.m. Caltrans said workers will be facilitating a sampling of drainpipe cement, collecting watersludge and doing other routine maintenance.

At least one bore of the tunnels will remain open in each direction during the closure.

Overnight motorists were advised to expect delays and to drive with caution.

Copyright 2026 Tribune Content Agency. All Rights Reserved.

This story was originally published May 18, 2026 at 1:38 PM.

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