Accident
Moderate Severity
Resolved
CHP : Traffic Collision on CA-4 Eastbound at Port Chicago Hwy (Concord). Lanes affected. Expect delays.
A injury accident was reported on CA-4 E near Contra Costa on September 27, 2026 at 11:45 AM.
Last Updated
1 month ago
Sep 27, 5:00 AM
Resolved
Sep 27, 11:15 AM
Coordinates
38.0140, -121.9960
Update History
3 observations
CHP : Traffic Collision on CA-4 Eastbound at Port Chicago Hwy (Concord). Lanes affected. Expect delays.
Sep 27, 5:00 AM
CHP : Traffic Collision on CA-4 Eastbound at Port Chicago Hwy (Concord). Lane blocked. Expect delays.
Sep 27, 4:45 AM
CHP : Traffic Collision on CA-4 Eastbound at Port Chicago Hwy (Concord). Lanes affected. Expect delays.
Sep 27, 4:30 AM
Source: 511_sfbay · ID 511.org/1555449
First seen Sep 27, 2026 4:30 AM