Major Collision Disrupts Morning Commute on US101

Traffic Collision on US101 in San Mateo Causes Delays Today

📍 San Mateo, CA

📅 Published: August 12, 2025 at 07:36 AM

Map showing the location of the accident in San Mateo, CA
San Mateo, August 12, 2025 -

A traffic collision occurred today on northbound US101 near Hillsdale Boulevard in San Mateo, CA, significantly impacting traffic flow during the morning commute. The incident involved four vehicles: a solo vehicle that exited the roadway onto an embankment, a Jeep SUV that spun out and struck a divider, a gray Jeep that rolled over, and an Acura that made contact with another vehicle.

As a result of the traffic incident, several lanes were blocked, including a slow lane, leading to delays and congestion for motorists in the area. Emergency response units were dispatched to the scene to manage traffic and ensure safety. Towing services were also requested to assist with the removal of the damaged vehicles.

Drivers traveling northbound on US101 should expect backups and plan for potential delays as crews work to clear the roadway. Authorities are actively managing the situation to restore normal traffic conditions as quickly as possible. Motorists are advised to exercise caution and consider alternative routes to avoid the affected area.

This traffic incident serves as a reminder of the importance of safe driving practices. Stay tuned for further updates as the situation develops and traffic conditions improve.

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