Accident High Severity Stale

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

A high-severity accident was reported on US-101 S near San Mateo on November 4, 2026 at 9:43 PM.

Road

US-101 S

Area

San Mateo

Address

Loading…

Started

Nov 4, 1:43 PM

Last Updated

20 minutes ago

Nov 4, 2:15 PM

Coordinates

37.6672, -122.3954

Update History

2 observations

CHP : Traffic Hazard on US-101 Southbound exiting at Sister Cities Blvd (South San Francisco). Off Ramp blocked. Expect delays. Nov 4, 2:15 PM

CHP : Traffic Hazard on US-101 Southbound exiting at Sister Cities Blvd (South San Francisco). Right lane blocked. Expect delays. Nov 4, 2:00 PM

Source: 511_sfbay · ID 511.org/1572938 First seen Nov 4, 2026 2:00 PM