Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound west of Walnut Blvd (Brentwood). Lane affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on September 12, 2026 at 2:30 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Sep 11, 7:30 PM

Last Updated

1 month, 2 weeks ago

Sep 11, 7:45 PM

Resolved

Sep 12, 1:45 AM

Coordinates

37.8964, -121.6963

Update History

3 observations

CHP : Traffic Collision on CA-4 Eastbound west of Walnut Blvd (Brentwood). Lane affected. Expect delays. Sep 11, 7:45 PM

CHP : Traffic Collision on CA-4 Eastbound west of Walnut Blvd (Brentwood). Lane affected. Expect delays. Sep 11, 7:15 PM

CHP : Traffic Collision on CA-4 Eastbound west of Walnut Blvd (Brentwood). Lane affected. Expect delays. Sep 11, 7:00 PM

Source: 511_sfbay · ID 511.org/1548199 First seen Sep 11, 2026 7:00 PM