Accident Moderate Severity Stale

CHP : Traffic Collision on US-101 Southbound north of Marsh Rd (Menlo Park). 2nd lane from the left blocked. Expect delays.

A injury accident was reported on US-101 S near San Mateo on August 19, 2026 at 2:51 PM.

Road

US-101 S

Area

San Mateo

Address

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Started

Aug 19, 7:51 AM

Last Updated

1 hour, 12 minutes ago

Aug 19, 8:15 AM

Coordinates

37.4833, -122.1809

Update History

1 observations

CHP : Traffic Collision on US-101 Southbound north of Marsh Rd (Menlo Park). 2nd lane from the left blocked. Expect delays. Aug 19, 8:00 AM

Source: 511_sfbay · ID 511.org/1537721 First seen Aug 19, 2026 8:00 AM