Planned Overnight Westbound Lane and Ramp Closures on Caldecott Tunnel for Memorial Day Week – 511 Contra Costa

Planned Overnight Westbound Lane and Ramp Closures on Caldecott Tunnel for Memorial Day Week

Note: there will not be any nighttime closures on Memorial Day. Nighttime closures will resume on Tuesday, May 29.
Below is the anticipated schedule of upcoming westbound ramp and lane closures associated with work on the Caldecott Fourth Bore Project. Please note that inclement weather may cause schedule changes.
Closures tentatively will begin Tuesday night, May 29 and will occur nightly through Thursday, May 31 (ending in the early morning of June 1). There will be no closure on Monday night, May 28, in observance of Memorial Day.

  • Overnight Westbound Fish Ranch Road Onramp Closures (in Orinda): 9 PM – 5 AM
  • Overnight Closures of right lanes on Westbound State Route 24 from the Camino Pablo Onramp (in Orinda) to Bore Three: 9:30 PM – 4 AM
  • Overnight Bore Three Closures (towards Oakland): 10 PM – 4 AM

Please note: On Friday night (June 1) closures of the above lanes and ramps are planned to begin one hour later than the Tuesday – Thursday schedule described above. The anticipated reopening times on Saturday, June 2, are:

  • Westbound Fish Ranch Road Onramp in Orinda expected to reopen at 8 a.m. on Saturday, June 2
  • Westbound State Route 24 right lanes between Camino Pablo onramp in Orinda and Bore #3 expected to reopen at 7 AM on Saturday, June 2
  • Bore #3 (towards Oakland) expected to reopen at 7 AM on Saturday, June 2

In addition to the excavation of a 3,400-foot-long tunnel north of the existing three bores, the $391.8 million Caldecott Fourth Bore Project includes traffic improvements on the eastern and western sides of the tunnel.
For more information on the upcoming closures visit the Traffic Page of the project website at http://www.caldecott-tunnel.org/index.php/traffic/traffic-advisories

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