Accident Moderate Severity Resolved

CHP : Traffic Collision on I-680 Southbound north of Olympic Blvd (Walnut Creek). Left lanes blocked. Expect delays.

A injury accident was reported on I-680 S near Contra Costa on April 20, 2026 at 11:12 PM.

Road

I-680 S

Area

Contra Costa

Address

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Started

Apr 20, 4:12 PM

Last Updated

6 months, 1 week ago

Apr 20, 4:30 PM

Resolved

Apr 20, 10:45 PM

Coordinates

37.8942, -122.0678

Update History

2 observations

CHP : Traffic Collision on I-680 Southbound north of Olympic Blvd (Walnut Creek). Left lanes blocked. Expect delays. Apr 20, 4:30 PM

CHP : Traffic Collision on I-680 Southbound south of S Main St (Walnut Creek). Lane affected. Expect delays. Apr 20, 4:15 PM

Source: 511_sfbay · ID 511.org/1483779 First seen Apr 20, 2026 4:15 PM