Major Traffic Disruption on State Route 57

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

📍 Diamond Bar, CA

📅 Published: July 4, 2025 at 02:04 AM

🔄 Updated: July 4, 2025 at 02:36 AM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, July 4, 2025 -

A traffic collision on State Route 57 North in Diamond Bar, CA, has resulted in significant traffic disruptions today. The incident occurred at the intersection just south of State Route 60 East, where a single vehicle, a white Toyota sedan, was found on the roadway shoulder with extensive rear-end damage. The vehicle is not drivable and requires towing services.

As a consequence of the traffic incident, lane restrictions are anticipated, leading to potential delays for motorists in the area. The California Highway Patrol (CHP) is on-site managing the situation to ensure safe traffic flow and scene control. Officers are directing vehicles around the affected lanes to minimize congestion.

Drivers are advised to consider alternative routes to avoid backups as the situation unfolds. A tow truck has been requested to remove the damaged vehicle, which should help alleviate some of the traffic issues once completed.

This incident highlights the importance of caution while navigating busy intersections, especially during peak travel times. Motorists are encouraged to stay informed about the traffic conditions as the CHP continues to work on restoring normal traffic flow.

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