Construction Active

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Cherry Hill Dr (Byron). All lanes closed. Avoid the area. From 7:00 AM Sunday, May 31, 2026 to 7:00 PM Sunday, May 31, 2026.

A construction was reported on CA-4 W near Contra Costa on May 31, 2026 at 2:00 PM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

May 31, 7:00 AM

Last Updated

5 minutes ago

May 31, 9:00 AM

Coordinates

37.8901, -121.5809

Update History

1 observations

Caltrans : Roadwork on CA-4 Eastbound and Westbound between San Joaquin County Line (Discovery Bay) and Cherry Hill Dr (Byron). All lanes closed. Avoid the area. From 7:00 AM Sunday, May 31, 2026 to 7:00 PM Sunday, May 31, 2026. May 31, 7:00 AM

Source: 511_sfbay · ID 511.org/1501072 First seen May 31, 2026 7:00 AM

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