Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound west of Lone Tree Way Bypass (Antioch). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on April 21, 2026 at 12:29 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 20, 5:29 PM

Last Updated

6 months ago

Apr 20, 5:30 PM

Resolved

Apr 20, 11:45 PM

Coordinates

37.9696, -121.7385

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound west of Lone Tree Way Bypass (Antioch). Lane affected. Expect delays. Apr 20, 5:30 PM

Source: 511_sfbay · ID 511.org/1483828 First seen Apr 20, 2026 5:30 PM