Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on June 19, 2026 at 1:05 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 18, 6:05 PM

Last Updated

4 months, 1 week ago

Jun 18, 6:15 PM

Resolved

Jun 19, 12:30 AM

Coordinates

37.9917, -121.7650

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound west of CA-160 (Antioch). Left lane affected. Expect delays. Jun 18, 6:15 PM

Source: 511_sfbay · ID 511.org/1510180 First seen Jun 18, 2026 6:15 PM