caldecott closure | 511 Contra Costa

Nighttime tunnel work on Caldecott tunnel happening tonight – Monday Nov 11, 2013

On Monday night, November 11, traffic through the Caldecott Tunnel will be reduced to one bore in each direction between the hours of 10:00 PM and 4:00 AM. Caltrans has planned to perform this work at night in order to minimize impacts to commute-hour traffic.
Motorists should expect traffic delays during the above hours, and are encouraged to plan ahead and allow additional drive time. This schedule is subject to change pending inclement weather.
Motorists are also urged to drive with extreme caution in the work area at the eastern and western sides of the tunnel. Workers will be on foot throughout the area during the closures.
The new bore was originally scheduled to open Saturday, Sunday, or early Monday, Nov. 18 but may be pushed back by rain. There will be no public fourth bore opening ceremony, but a small private ceremony will occur on Friday.


On Tuesday, September 10, 2013, the westbound Fish Ranch Road on-ramp in Orinda, Bore Three and the westbound Caldecott Lane off-ramp in Oakland will be closed, beginning at 10:00 p.m. and reopening at 4:00 a.m. on Wednesday, September 11, 2013.
In addition to the excavation of a 3,400-foot-long tunnel north of the existing three bores, the $405 million Caldecott Fourth Bore Project includes traffic improvements on the eastern and western sides of the tunnel. The tunnel is on schedule to open to traffic in late 2013.