Caltrans will close Bore 1 of the Caldecott Tunnel, carrying eastbound state Highway 24 in Alameda and Contra Costa counties, from 10 p.m. Tuesday to 4:30 a.m. Wednesday.
Closing the bore will accommodate work on lighting upgrades and routine maintenance, Caltrans said.
All other bores in both directions will be open, the highway agency said.
Copyright © 2026 Bay City News, Inc. All rights reserved. Republication, rebroadcast or redistribution without the express written consent of Bay City News, Inc. is prohibited. Bay City News is a 24/7 news service covering the greater Bay Area.