Accident High Severity Resolved

CHP : Traffic Collision on I-680 Northbound south of Treat Blvd (Walnut Creek). Off Ramp affected. Expect delays.

A high-severity accident was reported on I-680 N near Contra Costa on August 29, 2026 at 6:31 AM.

Road

I-680 N

Area

Contra Costa

Address

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Started

Aug 28, 11:31 PM

Last Updated

1 month, 4 weeks ago

Aug 29, 12:00 AM

Resolved

Aug 29, 6:15 AM

Coordinates

37.9264, -122.0604

Update History

1 observations

CHP : Traffic Collision on I-680 Northbound south of Treat Blvd (Walnut Creek). Off Ramp affected. Expect delays. Aug 28, 11:45 PM

Source: 511_sfbay · ID 511.org/1542393 First seen Aug 28, 2026 11:45 PM