Major Traffic Disruptions on State Route 166

Traffic Incident on State Route 166 in New Cuyama Causes Major Delays Today

📍 New Cuyama, CA

📅 Published: October 1, 2025 at 07:00 AM

🔄 Updated: October 1, 2025 at 10:30 AM

Map showing the location of the accident in New Cuyama, CA
New Cuyama, September 30, 2025 -

A significant traffic incident on State Route 166 in New Cuyama, CA, has led to major disruptions today. The incident, which began around 11:21 PM, resulted in the issuance of a SIG Alert due to necessary bridge repair work. State Route 166 was completely closed at mile marker 44.26, approximately three miles east of Rockfront Ranch, restricting all through traffic.

In response to the traffic incident, emergency services implemented lane closures and established one-way traffic control to manage vehicle flow. Oversized vehicles and semis were rerouted to alternative routes, including State Route 126 and State Route 41/State Route 46. The California Department of Transportation (Caltrans) and the Department of Transportation (DOT) coordinated efforts at the scene to minimize congestion and ensure safety.

By 6:10 AM, one-way traffic control was in effect, but motorists faced significant delays and backups, particularly on northbound U.S. Route 101 due to the ongoing closure. The DOT indicated that the timeline for full reopening of State Route 166 remains uncertain, with traffic management expected to continue throughout the day.

Motorists are advised to seek alternate routes and exercise caution while navigating the area. Updates will be provided as the situation develops.

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