Accident
Moderate Severity
Resolved
CHP : Traffic Collision on CA-4 Eastbound west of Somersville Rd (Antioch). Right shoulder affected. Expect delays.
A injury accident was reported on CA-4 E near Contra Costa on September 13, 2026 at 10:23 AM.
Last Updated
1 month, 2 weeks ago
Sep 13, 3:45 AM
Coordinates
38.0037, -121.8374
Update History
3 observations
CHP : Traffic Collision on CA-4 Eastbound west of Somersville Rd (Antioch). Right shoulder affected. Expect delays.
Sep 13, 3:30 AM
CHP : Traffic Collision on CA-4 Eastbound west of Somersville Rd (Antioch). Right shoulder affected. Expect delays.
Sep 13, 3:15 AM
CHP : Traffic Collision on CA-4 Eastbound west of Somersville Rd (Antioch). Right shoulder affected. Expect delays.
Sep 13, 3:00 AM
Source: 511_sfbay · ID 511.org/1548709
First seen Sep 13, 2026 3:00 AM