Overnight Full Closures On State Route 4 Scheduled Between Balfour Road And Sand Creek Road in Contra Costa County

Nightly Full closures continue between the hours of 7:00 PM to 8:00 AM

Contra Costa County - Caltrans Construction has scheduled full closures of State Route 4 (SR-4) over the next two weeks to ensure public safety and facilitate ongoing construction activities from Hillcrest Avenue to Byron Highway. These closures are necessary to complete grinding and paving operations, including the application of the final layer of Rubberized Hot Mix Asphalt (RHMA). SR-4 will be closed in both eastbound and westbound directions beginning Sunday, June 14, 2026, between Balfour Road and Walnut Boulevard , from 7:30 PM to 5:00 AM. In addition, grinding and paving work on westbound SR-4 from Lone Tree Way to Laurel Road is scheduled to start June 15, 2026, between 7:00 PM and 5:00 AM. For eastbound SR-4 traffic, grinding and paving from Laurel Road to Balfour Road will tentatively begin June 16, 2026, with work hours from 8:00 PM to 8:00 AM. Motorists are advised to adhere to posted signage and detour routes during these closure periods.

Please note: all scheduled work is weather dependent and subject to change.

Lane and ramp closure will continue to take place every Sunday through Thursday night between the hours of 7:00 PM to 8:00 AM throughout the duration of this project. To search for current District 4 lane closure information, please click here. This project is tentatively scheduled to be complete by Summer 2027.

Changeable message signs (CMS) will be posted throughout the corridor to assist drivers. Please follow posted signs and detour routes during these closure periods. Motorists are advised to expect delays and allow extra travel time

SR-4 Closure from Balfour Road to Walnut Boulevard Detour Information begins June 14^th 7:30PM-5AM:

June 14,2026, Sunday Night 7:30 PM
June 15,2026, Monday Morning 5:00 AM

WESTBOUND:

From Vasco Rd:

• Make a right on Walnut Blvd
• Turn left on Balfour Rd
• Turn right on Fairview Ave
• Turn left on Lone Tree Way
• Take the WB Hwy 4 onramp

From Byron and Discovery Bay:

• Turn right on Walnut Blvd
• Turn left on Balfour Rd
• Turn right on Fairview Ave
• Turn left on Lone Tree Way
• Take the WB Hwy 4 onramp

EASTBOUND:

To Livermore:

• Exit EB Hwy 4 on Balfour Rd
• Turn Left on Balfour Rd
• Turn right on Walnut Blvd
• Follow Walnut Blvd
• Left turn on Vasco Rd

To Byron and Discovery Bay:

• Exit EB Hwy 4 on Balfour Rd
• Turn Left on Balfour Rd
• Turn right on Walnut Blvd
• Follow Walnut Blvd t
• Turn right on Marsh Creek Road

All work is weather dependent and is subject to change.

Byron and Discovery Bay - Livermore

WHAT TO EXPECT

Drivers should note that SR-4 will be fully closed overnight, between Laurel Road to either Lonetree Way or Sand Creek Road beginning on June 15, 2026, from 7:00 PM to 5:00 AM. This project is tentatively scheduled to be completed by Summer 2027.

State Route 4 Full Closure from Lone Tree Way Laurel Road to Detour Map

(Tentative) June 16,2026, Tuesday Night 7 PM
June 17,2026, Wednesday Morning 5:00 AM

WESTBOUND:

From WB SR-4:

• Take Lone Tree Way Exit
• Turn left on Jeffrey Way
• Turn right on Lone Tree Way
• Turn left on Empire Ave
• Turn left on Laurel Rd
• Take WB on-ramp to SR-4

All work is weather dependent and is subject to change.

State Route 4 Full Closure from Sand Creek Road to Laurel Road Detour Map

June 15,2026, Monday Night 7:00 PM
June 16,2026, Tuesday Morning 5:00 AM

WESTBOUND:

From WB SR-4:

• Take Sand Creek Road Exit
• Turn left on Fairview Ave
• Turn left on Lone Tree Way
• Turn right on Empire Ave
• Turn left on Laurel Rd
• Take WB on-ramp to SR-4

For 24/7 traffic updates, please visit 511.org: https://x.com/511SFBay
For real-time information, visit Caltrans QuickMap: https://quickmap.dot.ca.gov
Follow us on X: https://x.com/CaltransD4
Or call 1-800-472-7623, 1-800-427-ROAD for state highway conditions statewide.