Major Traffic Jam Following Collision on SR-57

Traffic Collision on State Route 57 North in San Dimas Causes Significant Delays Today

📍 San Dimas, CA

📅 Published: June 11, 2025 at 07:35 PM

🔄 Updated: June 11, 2025 at 09:00 PM

Map showing the location of the accident in San Dimas, CA
San Dimas, June 11, 2025 -

A traffic collision occurred today on State Route 57 North near Arrow Highway in San Dimas, CA, involving four vehicles, including a Ford Explorer and a white SUV. The incident took place during the evening rush hour, leading to significant traffic disruptions.

The collision resulted in two vehicles overturning, with one on its side and another on its roof, blocking both the fast and high-occupancy vehicle (HOV) lanes. As a result, traffic was heavily impacted, causing delays and congestion for motorists in the area.

Emergency services quickly arrived on the scene to manage the situation and coordinate the removal of the vehicles. Debris was present on the roadway, complicating traffic flow further. Authorities issued a signal alert for the first lane, anticipating lane closures for approximately 60 minutes while crews worked to clear the wreckage.

Motorists were advised to seek alternate routes to avoid delays as cleanup efforts continued. The California Highway Patrol was on-site to monitor the situation and ensure the safe passage of vehicles once the roadway was cleared.

This traffic collision highlights the importance of safe driving practices during peak travel times, as incidents like this can lead to significant backups and delays for commuters.

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