Accident High Severity Resolved

CHP : Signal problem on CA-4 Eastbound and Westbound at Walnut Blvd (Brentwood). Lanes affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on April 10, 2026 at 5:37 PM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

Apr 10, 10:37 AM

Last Updated

1 month, 4 weeks ago

Apr 10, 12:15 PM

Resolved

Apr 10, 6:30 PM

Coordinates

37.8965, -121.6963

Update History

4 observations

CHP : Signal problem on CA-4 Eastbound and Westbound at Walnut Blvd (Brentwood). Lanes affected. Expect delays. Apr 10, 12:15 PM

CHP : Signal problem on CA-4 Westbound at Walnut Blvd (Brentwood). Lanes affected. Expect delays. Apr 10, 11:45 AM

CHP : Signal problem on CA-4 Westbound at Walnut Blvd (Brentwood). Lanes affected. Expect delays. Apr 10, 11:15 AM

CHP : Signal problem on CA-4 Westbound at Walnut Blvd (Brentwood). Lanes affected. Expect delays. Apr 10, 10:45 AM

Source: 511_sfbay · ID 511.org/1479386 First seen Apr 10, 2026 10:45 AM