Accident Moderate Severity Stale

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

A injury accident was reported on CA-4 W near Contra Costa on August 14, 2026 at 1:04 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 14, 6:04 AM

Last Updated

58 minutes ago

Aug 14, 7:30 AM

Coordinates

37.9952, -121.7559

Update History

2 observations

CHP : Traffic Hazard on CA-4 Westbound ramp to CA-160 (Antioch). Left lanes affected. Expect delays. Aug 14, 7:30 AM

CHP : Traffic Hazard on CA-4 Westbound ramp to CA-160 (Antioch). Left lanes affected. Expect delays. Aug 14, 7:00 AM

Source: 511_sfbay · ID 511.org/1535498 First seen Aug 14, 2026 7:00 AM