Overnight Lane Closures on Eastbound and Westbound State Route 4 in The City Of Martinez for Drainage Work

Friday, July 10, 2026, between the hours of 7:00 p.m. to 10:00 a.m. Saturday, July 11, 2026

Contra Costa County — Caltrans will perform overnight drainage work on SR-4 between Interstate 80 and McEwen Road, resulting in lane closures in both directions. This work involves drainage improvements to maintain roadway integrity and improve stormwater flow along the SR-4 corridor.

Closure Details: All work is weather dependent and subject to change

Location: Eastbound SR-4 Between WB I-80 to McEwen Road

• Closure Type: Alternating lane closures (Lane #1 and #2 of 3)
• Date: Friday, July 10, 2026
• Time: 7:00 p.m. to 10:00 a.m. (following morning)

Location: Westbound SR-4 Between McEwen Road and I-80 corridor limits

• Closure Type: Lane #2 closure (2 of 2 lanes affected intermittently)
• Date: Friday, July 10, 2026
• Time: 9:00 p.m. to 10:00 a.m. (following morning)

Traffic Impacts: Motorists are advised to expect delays and prepare to merge and allow extra travel time. Changeable message signs (CMS) will be posted throughout the corridor to assist drivers. For 24/7 traffic updates, follow 511.org on X. For real-time traffic, visit Caltrans QuickMap.

To search for current District 4 lane closure information, please click here.

Caltrans thanks the public for their patience during these necessary closures and improvements.