Full Closure Scheduled for Eastbound State Route 4 (SR-4) between Cummings Skyway on-ramp and Alhambra Avenue in Contra Costa County

Published:

CONTRA COSTA COUNTY – Caltrans has scheduled full overnight closures of all lanes Eastbound on State Route 4 (SR-4) between the Cummings Skyway on-ramp and the Alhambra Avenue exit the city of Martinez.

Closures Schedule:

  • Friday, October 17th - 7 PM to 6 AM
  • Monday, October 20th - 7 PM to 6 AM
  • Tuesday, October 21st - 7 PM to 6 AM
  • Wednesday, October 22nd - 7 PM to 6 AM
  • Thursday, October 23rd - 7 PM to 6 AM
  • Friday, October 24th - 7 PM to 6 AM
  • Saturday October 25th - 7 PM to 6 AM

**All work is weather dependent and subject to change.**

Detour Plan for EB traffic from Cummings Skyway to Alhambra:

  1. Exit Cummings Skyway Offramp.
  2. Left on Cummings Skyway
  3. Right on Franklin Canyon Rd.
  4. Left on Alhambra Ave.
  5. Right on EB 4 Onramp

Map highlighting the detour route for the  closure of eastbound State Route 4 between Cummings Skyway and Alhambra Road in Contra Costa County.

Changeable message signs will be in place to assist motorists traveling in the area. Motorists are advised to expect delays and allow extra time. For 24/7 traffic updates, follow 511.org on Twitter. For real-time traffic, visit Caltrans QuickMap.

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