Construction Resolved

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, August 14, 2026 to 5:00 AM Monday, August 17, 2026.

A construction was reported on CA-4 W near Contra Costa on August 15, 2026 at 5:00 AM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

Aug 14, 10:00 PM

Last Updated

2 months, 1 week ago

Aug 17, 4:45 AM

Resolved

Aug 17, 10:45 AM

Coordinates

37.9275, -121.3324

Update History

5 observations

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, August 14, 2026 to 5:00 AM Monday, August 17, 2026. Aug 16, 1:00 PM

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, August 14, 2026 to 5:00 AM Monday, August 17, 2026. Aug 16, 7:15 AM

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, August 14, 2026 to 5:00 AM Monday, August 17, 2026. Aug 15, 1:00 PM

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, August 14, 2026 to 5:00 AM Monday, August 17, 2026. Aug 15, 7:00 AM

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, August 14, 2026 to 5:00 AM Monday, August 17, 2026. Aug 14, 10:15 PM

Source: 511_sfbay · ID 511.org/1535532 First seen Aug 14, 2026 10:15 PM