Accident High Severity Resolved

CHP : Traffic Collision on I-680 Southbound north of Monument Blvd (Pleasant Hill). Off Ramp blocked. Expect delays.

A high-severity accident was reported on I-680 S near Contra Costa on September 17, 2026 at 8:22 PM.

Road

I-680 S

Area

Contra Costa

Address

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Started

Sep 17, 1:22 PM

Last Updated

1 month, 1 week ago

Sep 17, 2:00 PM

Resolved

Sep 17, 8:15 PM

Coordinates

37.9493, -122.0569

Update History

3 observations

CHP : Traffic Collision on I-680 Southbound north of Monument Blvd (Pleasant Hill). Off Ramp blocked. Expect delays. Sep 17, 2:00 PM

CHP : Traffic Collision on I-680 Southbound north of Monument Blvd (Pleasant Hill). Off Ramp blocked. Expect delays. Sep 17, 1:45 PM

CHP : Traffic Collision on I-680 Southbound exiting at CA-242 S (Concord). Off Ramp blocked. Expect delays. Sep 17, 1:30 PM

Source: 511_sfbay · ID 511.org/1550890 First seen Sep 17, 2026 1:30 PM