Accident Moderate Severity Stale

CHP : Traffic Hazard on CA-4 Westbound west of Discovery Bay Blvd (Discovery Bay). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 27, 2026 at 2:32 PM.

Road

CA-4 W

Area

Contra Costa

Started

Oct 27, 7:32 AM

Last Updated

2 hours, 23 minutes ago

Oct 27, 8:15 AM

Update History

2 observations

CHP : Traffic Hazard on CA-4 Westbound west of Discovery Bay Blvd (Discovery Bay). Lane affected. Expect delays. Oct 27, 8:15 AM

CHP : Traffic Hazard on CA-4 Westbound west of Discovery Bay Blvd (Discovery Bay). Lane affected. Expect delays. Oct 27, 7:45 AM

Source: 511_sfbay · ID 511.org/1569157 First seen Oct 27, 2026 7:45 AM