Accident
High Severity
Resolved
CHP : Traffic Collision with Injuries on CA-4 Westbound entering at Port Chicago Hwy (Concord). On Ramp blocked. Expect delays.
A high-severity accident was reported on CA-4 W near Contra Costa on June 6, 2026 at 1:43 AM.
Last Updated
4 days, 8 hours ago
Jun 5, 8:15 PM
Coordinates
38.0099, -122.0225
Update History
4 observations
CHP : Traffic Collision with Injuries on CA-4 Westbound entering at Port Chicago Hwy (Concord). On Ramp blocked. Expect delays.
Jun 5, 8:00 PM
CHP : Traffic Collision with Injuries on CA-4 Westbound entering at Port Chicago Hwy (Concord). On Ramp blocked. Expect delays.
Jun 5, 7:30 PM
CHP : Traffic Collision with Injuries on CA-4 Westbound ramp to CA-242 S (Concord). Lanes blocked. Expect delays.
Jun 5, 7:00 PM
CHP : Traffic Collision with Injuries on CA-4 Westbound ramp to CA-242 S (Concord). Lanes blocked. Expect delays.
Jun 5, 6:45 PM
Source: 511_sfbay · ID 511.org/1504359
First seen Jun 5, 2026 6:45 PM