Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Westbound east of I-80 W (Hercules). Lane affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on August 19, 2026 at 4:20 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 19, 9:20 AM

Last Updated

1 day, 3 hours ago

Aug 19, 9:45 AM

Resolved

Aug 19, 4:00 PM

Coordinates

38.0151, -122.2692

Update History

2 observations

CHP : Traffic Collision on CA-4 Westbound east of I-80 W (Hercules). Lane affected. Expect delays. Aug 19, 9:45 AM

CHP : Traffic Collision and Debris on CA-4 Westbound east of I-80 W (Hercules). Left lane blocked. Expect delays. Aug 19, 9:30 AM

Source: 511_sfbay · ID 511.org/1537788 First seen Aug 19, 2026 9:30 AM