Overnight Full Freeway Closure Between State Route 4 And Byron Highway for Paving Operations

Tuesday, August 4, through Thursday, August 6th
between 7:00 p.m. to 5:00 a.m.

Contra Costa County — For the safety of the traveling public and construction crews, Caltrans will implement full overnight closures at the intersection of State Route 4 (SR‑4) and Byron Highway in Brentwood from Tuesday, August 4 through Thursday, August 6, between 7:00 p.m. and 5:00 a.m. to allow crews to continue grinding and paving operations. Motorists are advised to follow posted detours. All work is weather dependent and subject to change.

To view current Caltrans lane-closure information, please click here.

Full Freeway Closures (SR-4 and Byron Hwy):

• The intersection and shared segment of State Route 4 and Byron Highway

Please note complete closures, as well as lane and ramp closures, will continue along SR-4 Sunday through Thursday nights between 7:00 p.m. and 8:00 a.m. The westbound closures on SR-4 will reopen at 5:00 a.m. This project is tentatively scheduled to be completed by Summer 2027.

Changeable message signs (CMS) will be posted throughout the corridor to assist drivers.

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