Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound north of Byron Hwy (Brentwood). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 27, 2026 at 2:28 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 27, 7:28 AM

Last Updated

6 hours, 2 minutes ago

Oct 27, 8:00 AM

Resolved

Oct 27, 2:00 PM

Coordinates

37.8965, -121.6413

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound north of Byron Hwy (Brentwood). Lane affected. Expect delays. Oct 27, 7:30 AM

Source: 511_sfbay · ID 511.org/1569152 First seen Oct 27, 2026 7:30 AM