Accident
Moderate Severity
Resolved
CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lane affected. Expect delays.
A injury accident was reported on CA-4 W near Contra Costa on May 10, 2026 at 8:40 AM.
Last Updated
5 months, 2 weeks ago
May 10, 6:45 AM
Resolved
May 10, 12:45 PM
Coordinates
38.0052, -121.8419
Update History
4 observations
CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lane affected. Expect delays.
May 10, 1:45 AM
CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lane affected. Expect delays.
May 10, 1:30 AM
CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lane affected. Expect delays.
May 10, 1:00 AM
CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Right shoulder affected. Expect delays.
May 10, 12:45 AM
Source: 511_sfbay · ID 511.org/1492573
First seen May 10, 2026 12:45 AM