Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 9, 2026 at 9:08 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 9, 2:08 PM

Last Updated

2 weeks, 3 days ago

Oct 9, 2:45 PM

Resolved

Oct 9, 9:00 PM

Coordinates

37.9958, -122.0664

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). Lane affected. Expect delays. Oct 9, 2:30 PM

Source: 511_sfbay · ID 511.org/1561557 First seen Oct 9, 2026 2:30 PM