Accident Moderate Severity Stale

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

A injury accident was reported on CA-4 E near Contra Costa on November 6, 2026 at 5:37 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Nov 5, 9:37 PM

Last Updated

1 hour, 47 minutes ago

Nov 5, 9:45 PM

Coordinates

37.8900, -121.6413

Update History

2 observations

CHP : Traffic Collision on CA-4 Eastbound at Byron Hwy (Brentwood). Lane affected. Expect delays. Nov 5, 9:45 PM

CHP : Traffic Collision on CA-4 Eastbound at Byron Hwy (Brentwood). Lane affected. Expect delays. Nov 5, 9:30 PM

Source: 511_sfbay · ID 511.org/1573714 First seen Nov 5, 2026 9:30 PM