Major Traffic Disruptions on I-57 in Diamond Bar

Traffic Collision on Interstate 57 in Diamond Bar Causes Delays Today

📍 Diamond Bar, CA

📅 Published: March 5, 2025 at 11:50 PM

Map showing the location of the accident in Diamond Bar, CA
Diamond Bar, March 5, 2025 -

A traffic collision on Interstate 57 South in Diamond Bar, CA, has caused significant traffic disruptions today. The incident occurred around 9:53 PM when a blue Mercedes-Benz C300 4-door became undrivable after blocking the off-ramp at Diamond Bar Boulevard. Emergency units were deployed to manage traffic and control the scene, resulting in lane closures and a blocked off-ramp.

As the situation developed, the vehicle was reported to be sideways with hazard lights activated, leading to delays for motorists in the area. By 10:30 PM, emergency responders were holding all lanes to facilitate the removal of the vehicle. A tow truck was called to the scene to assist with the vehicle's removal.

Traffic management efforts continued throughout the evening, with responders working diligently to clear the area and restore normal traffic flow. The mainline of Interstate 57 remained open, but the Diamond Bar off-ramp was temporarily closed to ensure safety during the response.

Motorists experienced congestion and delays as cleanup efforts progressed. The off-ramp was reopened shortly after 11 PM, allowing traffic to resume its normal pattern. Commuters are advised to remain cautious and aware of potential lingering traffic impacts in the area as conditions normalize.

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