Major Traffic Backup on State Route 60

Traffic Collision on State Route 60 in Diamond Bar Causes Delays Today

📍 Diamond Bar, CA

📅 Published: August 2, 2025 at 10:30 PM

🔄 Updated: August 2, 2025 at 11:33 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, August 2, 2025 -

A traffic collision occurred today on State Route 60 West at Grand Avenue in Diamond Bar, CA, involving four vehicles, including a white Chrysler 300 and a black Chevrolet Silverado. The incident took place during the evening rush hour, leading to significant traffic delays and backups in the area.

Emergency response teams arrived promptly to manage the scene and control traffic flow. The middle and high-occupancy vehicle lanes were blocked due to the collision, which involved a semi-truck that collided with a stalled vehicle. As a result, several vehicles remained on-site awaiting towing.

Motorists traveling through this area should expect delays and consider alternative routes to avoid congestion. The traffic incident has caused a ripple effect, impacting nearby roads and intersections, further complicating the evening commute.

Emergency responders are actively working to clear the scene and restore normal traffic conditions. Drivers are advised to stay informed about road conditions and exercise caution while navigating through the affected area.

As the situation develops, updates will be provided regarding the reopening of lanes and the resolution of this traffic collision. Commuters in Diamond Bar, CA, are encouraged to remain patient as emergency crews work to ensure the safety of all road users.

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