Accident
Resolved
CHP : Residual delays on CA-4 Westbound east of Port Chicago Hwy (Concord). All lanes open. Expect delays.
A accident was reported on CA-4 W near Contra Costa on September 21, 2026 at 10:25 PM.
Last Updated
1 month ago
Sep 21, 6:30 PM
Resolved
Sep 22, 12:45 AM
Coordinates
38.0112, -122.0153
Update History
5 observations
CHP : Residual delays on CA-4 Westbound east of Port Chicago Hwy (Concord). All lanes open. Expect delays.
Sep 21, 6:30 PM
CHP : Severe traffic alert and Traffic Collision on CA-4 Westbound east of Port Chicago Hwy (Concord). Right lanes blocked. Expect delays.
Sep 21, 5:30 PM
CHP : Severe traffic alert and Traffic Collision on CA-4 Westbound east of Port Chicago Hwy (Concord). Right lanes blocked. Expect delays.
Sep 21, 4:30 PM
CHP : Severe traffic alert and Traffic Collision on CA-4 Westbound east of Port Chicago Hwy (Concord). Right lanes blocked. Expect delays.
Sep 21, 4:15 PM
CHP : Severe traffic alert and Traffic Collision on CA-4 Westbound east of Port Chicago Hwy (Concord). Right lanes blocked. Expect delays.
Sep 21, 3:45 PM
Source: 511_sfbay · ID 511.org/1552611
First seen Sep 21, 2026 3:45 PM