Major Traffic Disruption on I-405 Off-Ramp

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

📍 Costa Mesa, CA

📅 Published: July 1, 2025 at 06:03 PM

🔄 Updated: July 1, 2025 at 08:30 PM

Map showing the location of the accident in Costa Mesa, CA
Costa Mesa, July 1, 2025 -

A traffic collision on the off-ramp of Interstate 405 South (I-405) at Harbor Boulevard in Costa Mesa, CA, has resulted in significant lane blockages today. The incident involved one vehicle, a black Ford Expedition, which collided with a light pole, causing damage to its front end. As a result, both the far left and far right lanes of the off-ramp are currently blocked, leading to potential delays for motorists in the area.

Emergency traffic management units were dispatched to the scene shortly after the collision was reported at approximately 4:34 PM. These units are actively controlling traffic and managing the incident to minimize disruption. Although the damaged light pole remains standing, crews are working to ensure the area is safe for drivers.

Motorists are advised to exercise caution when approaching the off-ramp at I-405 South and Harbor Boulevard, as residual congestion may persist due to the earlier traffic incident. Drivers should anticipate possible backups and consider alternative routes to avoid delays during the afternoon commute.

Stay updated on traffic conditions as the situation develops, and plan accordingly to ensure a smooth travel experience.

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