Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound west of San Joaquin County Line (Byron). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on May 25, 2026 at 12:56 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 25, 5:56 AM

Last Updated

18 hours, 27 minutes ago

May 25, 6:00 AM

Resolved

May 25, 12:15 PM

Coordinates

37.8903, -121.5694

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound west of San Joaquin County Line (Byron). Lane affected. Expect delays. May 25, 6:00 AM

Source: 511_sfbay · ID 511.org/1499130 First seen May 25, 2026 6:00 AM