Accident Moderate Severity Resolved

CHP : Disabled vehicle 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 August 21, 2026 at 9:11 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 21, 2:11 PM

Last Updated

2 months ago

Aug 21, 2:30 PM

Resolved

Aug 21, 8:30 PM

Coordinates

37.9554, -121.7444

Update History

1 observations

CHP : Disabled vehicle on CA-4 Westbound exiting at Lone Tree Way Bypass (Antioch). Right lane blocked. Expect delays. Aug 21, 2:30 PM

Source: 511_sfbay · ID 511.org/1538928 First seen Aug 21, 2026 2:30 PM