Accident Moderate Severity Resolved

CHP : Traffic Collision with Injuries on CA-4 Westbound exiting at Lone Tree Way Bypass (Antioch). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on July 29, 2026 at 1:40 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jul 29, 6:40 AM

Last Updated

2 months, 4 weeks ago

Jul 29, 7:30 AM

Resolved

Jul 29, 1:45 PM

Coordinates

37.9618, -121.7425

Update History

3 observations

CHP : Traffic Collision with Injuries on CA-4 Westbound exiting at Lone Tree Way Bypass (Antioch). Right lane blocked. Expect delays. Jul 29, 7:15 AM

CHP : Traffic Collision with Injuries on CA-4 Westbound exiting at Lone Tree Way Bypass (Antioch). Right lane blocked. Expect delays. Jul 29, 7:00 AM

CHP : Traffic Collision with Injuries on CA-4 Westbound exiting at Lone Tree Way Bypass (Antioch). Right lane blocked. Expect delays. Jul 29, 6:45 AM

Source: 511_sfbay · ID 511.org/1527798 First seen Jul 29, 2026 6:45 AM