Major Traffic Disruption from Vehicle Collision

Traffic Collision on State Route 121 in Napa Causes Delays Today

📍 Napa, CA

📅 Published: September 20, 2025 at 10:33 AM

🔄 Updated: September 20, 2025 at 12:02 PM

Map showing the location of the accident in Napa, CA
Napa, September 20, 2025 -

A traffic collision involving two vehicles occurred today at the intersection of State Route 121 and Wooden Valley Road in Napa, CA. The incident took place around 9:57 AM and involved a white Mazda and a white Toyota Highlander.

Following the collision, both northbound lanes were blocked, causing significant traffic delays and congestion in the area. Emergency response teams arrived promptly to manage the situation. A tow truck was dispatched to assist in clearing the roadway, successfully moving one vehicle to a turnout lane. However, the second vehicle remained in the northbound lane, necessitating one-way traffic control to facilitate safe passage for motorists.

Traffic management procedures were implemented effectively, with several units on the scene working to clear the blockage. By 11:06 AM, all lanes were reported to be open, alleviating the traffic backup that had developed during the incident.

Motorists traveling through the area are advised to remain cautious and stay updated on traffic conditions, as residual delays may still be experienced following the resolution of the traffic incident. The California Highway Patrol encourages drivers to exercise patience and adhere to all traffic control measures in place.

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