Accident Moderate Severity Resolved

CHP : Traffic Hazard on US-101 Southbound north of Sister Cities Blvd (South San Francisco). Left lanes affected. Expect delays.

A injury accident was reported on US-101 S near San Mateo on May 23, 2026 at 5:20 PM.

Road

US-101 S

Area

San Mateo

Address

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Started

May 23, 10:20 AM

Last Updated

22 hours, 42 minutes ago

May 23, 10:45 AM

Resolved

May 23, 5:00 PM

Coordinates

37.6696, -122.3931

Update History

1 observations

CHP : Traffic Hazard on US-101 Southbound north of Sister Cities Blvd (South San Francisco). Left lanes affected. Expect delays. May 23, 10:30 AM

Source: 511_sfbay · ID 511.org/1498624 First seen May 23, 2026 10:30 AM