Accident Moderate Severity Stale

CHP : Traffic Collision with Injuries 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 April 25, 2026 at 4:29 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 25, 9:29 AM

Last Updated

1 hour, 19 minutes ago

Apr 25, 9:30 AM

Coordinates

37.8914, -121.5702

Update History

1 observations

CHP : Traffic Collision with Injuries on CA-4 Westbound west of San Joaquin County Line (Byron). Lane affected. Expect delays. Apr 25, 9:30 AM

Source: 511_sfbay · ID 511.org/1486022 First seen Apr 25, 2026 9:30 AM