Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound at Byron Hwy (Brentwood). Lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 7, 2026 at 7:06 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 7, 12:06 PM

Last Updated

2 weeks, 5 days ago

Oct 7, 12:45 PM

Resolved

Oct 7, 7:00 PM

Coordinates

37.8965, -121.6413

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound at Byron Hwy (Brentwood). Lane blocked. Expect delays. Oct 7, 12:15 PM

Source: 511_sfbay · ID 511.org/1560344 First seen Oct 7, 2026 12:15 PM