Accident High Severity Stale

CHP : Traffic Hazard on US-101 Southbound at Sister Cities Blvd (South San Francisco). Off Ramp affected. Expect delays.

A high-severity accident was reported on US-101 S near San Mateo on November 6, 2026 at 10:52 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Nov 6, 2:52 AM

Last Updated

1 hour, 15 minutes ago

Nov 6, 3:00 AM

Coordinates

37.6674, -122.3951

Update History

1 observations

CHP : Traffic Hazard on US-101 Southbound at Sister Cities Blvd (South San Francisco). Off Ramp affected. Expect delays. Nov 6, 3:00 AM

Source: 511_sfbay · ID 511.org/1573792 First seen Nov 6, 2026 3:00 AM