Major Traffic Disruption on I-405 in Costa Mesa

Traffic Collision on Interstate 405 South in Costa Mesa Causes Delays Today

📍 Costa Mesa, CA

📅 Published: July 11, 2025 at 11:00 AM

Map showing the location of the accident in Costa Mesa, CA
Costa Mesa, July 11, 2025 -

A traffic collision on Interstate 405 South in Costa Mesa, CA, caused significant traffic disruptions today during the morning commute. The incident involved two vehicles, with one remaining drivable on the roadway while the other was towed from the scene.

The collision occurred around 9:17 AM, prompting a rapid response from emergency services. Traffic management units were deployed to secure the area and manage the flow of vehicles. As a result, lane closures and adjustments were implemented, leading to delays and congestion for motorists in the vicinity of the Harbor Boulevard South on-ramp.

By approximately 10:27 AM, the towed vehicle was removed from the roadway, allowing traffic to gradually return to normal. However, drivers experienced backups and slower travel times during the incident. Authorities advised motorists to seek alternate routes to avoid the affected area.

The California Highway Patrol continues to monitor traffic conditions to ensure safety on the roadways. Motorists are reminded to stay alert and drive cautiously in the area, as residual delays may linger following the traffic incident.

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