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.
Last Updated
1 month, 4 weeks ago
Apr 10, 12:15 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