Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on October 31, 2026 at 12:35 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 30, 5:35 PM

Last Updated

11 hours, 6 minutes ago

Oct 30, 6:15 PM

Resolved

Oct 31, 12:30 AM

Coordinates

37.9890, -121.7523

Update History

2 observations

CHP : Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left and center lanes affected. Expect delays. Oct 30, 6:15 PM

CHP : Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left and center lanes affected. Expect delays. Oct 30, 5:45 PM

Source: 511_sfbay · ID 511.org/1570942 First seen Oct 30, 2026 5:45 PM