Accident High Severity Resolved

CHP : Traffic Collision on US-101 Northbound at W Sierra Ave (Cotati). Off Ramp affected. Expect delays.

A high-severity accident was reported on US-101 N near Sonoma on October 21, 2026 at 9:49 AM.

Road

US-101 N

Area

Sonoma

Address

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Started

Oct 21, 2:49 AM

Last Updated

6 days, 14 hours ago

Oct 21, 3:15 AM

Resolved

Oct 21, 9:30 AM

Coordinates

38.3182, -122.7143

Update History

1 observations

CHP : Traffic Collision on US-101 Northbound at W Sierra Ave (Cotati). Off Ramp affected. Expect delays. Oct 21, 3:00 AM

Source: 511_sfbay · ID 511.org/1566590 First seen Oct 21, 2026 3:00 AM