Accident Moderate Severity Stale

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 12:59 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 25, 5:59 AM

Last Updated

2 hours, 44 minutes ago

May 25, 6:00 AM

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/1499131 First seen May 25, 2026 6:00 AM