Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left lanes affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 16, 2026 at 2:38 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 15, 7:38 PM

Last Updated

1 month, 1 week ago

Sep 15, 8:15 PM

Resolved

Sep 16, 2:15 AM

Coordinates

37.9917, -121.7650

Update History

2 observations

CHP : Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left lanes affected. Expect delays. Sep 15, 8:00 PM

CHP : Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Lane affected. Expect delays. Sep 15, 7:45 PM

Source: 511_sfbay · ID 511.org/1549928 First seen Sep 15, 2026 7:45 PM