Accident Moderate Severity Resolved

CHP : Traffic Collision on US-101 Southbound south of E 4TH Ave (San Mateo). Lane blocked. Expect delays.

A injury accident was reported on US-101 S near San Mateo on September 12, 2026 at 4:17 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Sep 11, 9:17 PM

Last Updated

1 month, 2 weeks ago

Sep 11, 9:30 PM

Resolved

Sep 12, 3:30 AM

Coordinates

37.5682, -122.3112

Update History

1 observations

CHP : Traffic Collision on US-101 Southbound south of E 4TH Ave (San Mateo). Lane blocked. Expect delays. Sep 11, 9:30 PM

Source: 511_sfbay · ID 511.org/1548277 First seen Sep 11, 2026 9:30 PM