Accident High Severity Resolved

CHP : Traffic Collision with Injuries on CA-4 Eastbound exiting at Sycamore Ave (Hercules). Off Ramp blocked. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on May 10, 2026 at 7:20 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

May 10, 12:20 PM

Last Updated

4 weeks, 2 days ago

May 10, 1:45 PM

Resolved

May 10, 8:00 PM

Coordinates

38.0146, -122.2500

Update History

4 observations

CHP : Traffic Collision with Injuries on CA-4 Eastbound exiting at Sycamore Ave (Hercules). Off Ramp blocked. Expect delays. May 10, 1:30 PM

CHP : Traffic Collision with Injuries on CA-4 Eastbound exiting at Sycamore Ave (Hercules). Off Ramp blocked. Expect delays. May 10, 12:30 PM

CHP : Traffic Collision with Injuries on CA-4 Eastbound at Sycamore Ave (Hercules). Off Ramp affected. Expect delays. May 10, 12:15 PM

CHP : Traffic Collision with Injuries on CA-4 Eastbound at Sycamore Ave (Hercules). Lane affected. Expect delays. May 10, 12:00 PM

Source: 511_sfbay · ID 511.org/1492661 First seen May 10, 2026 12:00 PM