Accident High Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound west of CA-242 N (Concord). Left lanes affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on September 2, 2026 at 4:30 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 2, 9:30 AM

Last Updated

1 month, 3 weeks ago

Sep 2, 9:45 AM

Resolved

Sep 2, 3:45 PM

Coordinates

38.0039, -122.0421

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound west of CA-242 N (Concord). Left lanes affected. Expect delays. Sep 2, 9:45 AM

Source: 511_sfbay · ID 511.org/1544217 First seen Sep 2, 2026 9:45 AM