Major Traffic Jam on I-405 After Collision

Traffic Collision on Interstate 405 in Costa Mesa Causes Lane Closures Today

📍 Costa Mesa, CA

📅 Published: August 27, 2025 at 10:35 AM

Map showing the location of the accident in Costa Mesa, CA
Costa Mesa, August 27, 2025 -

A traffic collision involving four vehicles occurred today on the northbound lanes of Interstate 405 (I-405) near State Route 55 in Costa Mesa, CA. The incident took place around 9:28 AM during the busy morning commute and involved a red Toyota Prius, a white truck, and two additional vehicles.

The collision resulted in the blockage of the middle lanes, prompting immediate traffic management efforts. Emergency services arrived on the scene to oversee the situation and facilitate the safe movement of vehicles. By 9:36 AM, two of the vehicles were moved to the roadside, but the remaining vehicles continued to obstruct traffic, contributing to delays and congestion for drivers.

As the situation developed, emergency personnel worked to clear the scene efficiently. By 10:24 AM, all lanes were reported to be open, allowing traffic to resume its normal flow. However, motorists should remain cautious and expect potential residual delays as traffic begins to clear.

Travelers on Interstate 405 in Costa Mesa are advised to stay informed about traffic conditions and consider alternate routes if necessary. The California Highway Patrol is actively monitoring the area to ensure safe passage for all drivers.

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