Accident Moderate Severity Resolved

CHP : Severe traffic alert and Traffic Collision on US-101 Northbound ramp to CA-92 E (San Mateo). 2nd lane from the left blocked. Expect delays.

A injury accident was reported on US-101 N near San Mateo on September 5, 2026 at 1:18 AM.

Road

US-101 N

Area

San Mateo

Address

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Started

Sep 4, 6:18 PM

Last Updated

1 month, 3 weeks ago

Sep 4, 7:00 PM

Resolved

Sep 5, 1:15 AM

Coordinates

37.5509, -122.2932

Update History

4 observations

CHP : Severe traffic alert and Traffic Collision on US-101 Northbound ramp to CA-92 E (San Mateo). 2nd lane from the left blocked. Expect delays. Sep 4, 7:00 PM

CHP : Severe traffic alert and Traffic Collision on US-101 Northbound ramp to CA-92 E (San Mateo). 2nd lane from the left blocked. Expect delays. Sep 4, 6:45 PM

CHP : Traffic Collision on US-101 Northbound ramp to CA-92 W (San Mateo). 2nd lane from the left blocked. Expect delays. Sep 4, 6:30 PM

CHP : Traffic Collision on US-101 Northbound south of CA-92 W (San Mateo). Lane affected. Expect delays. Sep 4, 6:15 PM

Source: 511_sfbay · ID 511.org/1545389 First seen Sep 4, 2026 6:15 PM

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