Major Traffic Disruption on US Highway 101

Traffic Collision on US Highway 101 in San Mateo Causes Significant Delays Today

📍 San Mateo, CA

📅 Published: May 15, 2025 at 09:06 PM

🔄 Updated: May 15, 2025 at 09:36 PM

Map showing the location of the accident in San Mateo, CA
San Mateo, May 15, 2025 -

A traffic collision on US Highway 101 South in San Mateo, CA, has led to significant traffic disruptions today. The incident occurred near the 3rd Avenue interchange, resulting in the closure of both northbound and southbound lanes on the highway. Additionally, westbound 3rd Avenue has been closed from the US Highway 101 off-ramp to prevent vehicles from entering the area, causing backups on both eastbound and westbound lanes.

Emergency response teams, including multiple units from the California Highway Patrol and local agencies, were dispatched to the scene to manage traffic and control the situation. Authorities requested that no vehicles be allowed onto 3rd Avenue to facilitate the response efforts.

As a result of the traffic incident, motorists can expect delays and congestion in the area, particularly during the evening commute. Drivers are advised to seek alternative routes to avoid the affected sections of US Highway 101 and 3rd Avenue.

The situation is ongoing, and updates will be provided as more information becomes available. Commuters should remain cautious and patient as emergency services work to clear the scene and restore normal traffic flow.

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