Morning Collision Causes Traffic Delays on SR-57

Traffic Collision on State Route 57 South in Diamond Bar Causes Delays Today

📍 Diamond Bar, CA

📅 Published: May 25, 2025 at 07:32 AM

🔄 Updated: May 25, 2025 at 07:30 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, May 25, 2025 -

A traffic collision involving two vehicles occurred this morning on State Route 57 South near Pathfinder Road Off-Ramp in Diamond Bar, CA. The incident was reported at approximately 6:56 AM, involving a gray Honda CRV and a white Mazda. Following the collision, both vehicles were blocking lanes, leading to temporary lane closures and traffic congestion during the morning commute.

Emergency response teams were promptly dispatched to manage the scene and control traffic flow. A tow truck was called to assist with the removal of the damaged vehicles, with one vehicle being prepared for towing while the other was managed on-site. California Highway Patrol units coordinated traffic management to ensure safety and minimize disruptions.

As a result of the traffic incident, drivers experienced delays and backups in the area, particularly in the fast and slow lanes. By 8:00 AM, all lanes were reopened, alleviating the congestion. The California Highway Patrol issued a signal alert for affected lanes, advising motorists of the ongoing situation.

Motorists traveling through Diamond Bar, CA, should remain cautious and aware of potential residual delays as traffic resumes normal flow following the incident.

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