Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound west of G St (Antioch). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 14, 2026 at 8:36 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 14, 1:36 PM

Last Updated

1 month, 1 week ago

Sep 14, 2:15 PM

Resolved

Sep 14, 8:30 PM

Coordinates

37.9987, -121.8180

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound west of G St (Antioch). Right lane blocked. Expect delays. Sep 14, 1:45 PM

Source: 511_sfbay · ID 511.org/1549207 First seen Sep 14, 2026 1:45 PM