Accident Moderate Severity Resolved

CHP : Traffic Collision with Injuries on CA-4 Eastbound ramp to I-680 N (Martinez). Left lane blocked. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on October 22, 2026 at 4:09 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Oct 22, 9:09 AM

Last Updated

5 days ago

Oct 22, 10:15 AM

Resolved

Oct 22, 4:30 PM

Coordinates

37.9947, -122.0696

Update History

2 observations

CHP : Traffic Collision with Injuries on CA-4 Eastbound ramp to I-680 N (Martinez). Left lane blocked. Expect delays. Oct 22, 10:00 AM

CHP : Traffic Collision with Injuries on I-680 Northbound south of Ygnacio Valley Rd (Walnut Creek). Right lane blocked. Expect delays. Oct 22, 9:30 AM

Source: 511_sfbay · ID 511.org/1567087 First seen Oct 22, 2026 9:30 AM

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