A significant traffic collision on State Route 57 North in Diamond Bar, CA, caused major disruptions today. The incident, which involved two vehicles—a gray Lexus and a black Lexus—occurred around 3:14 AM, blocking multiple lanes and prompting a full lane closure.
Emergency response teams quickly arrived to manage traffic and control the scene. A tow truck was called to assist in removing the vehicles, which were obstructing the roadway. As a result, traffic was diverted onto alternate routes, leading to significant delays for motorists.
By approximately 3:37 AM, authorities implemented a hard closure of the northbound lanes of State Route 57, advising drivers to use the westbound State Route 60 or the high-occupancy vehicle flyover as detours. A signal alert was issued shortly thereafter, indicating that all lanes were stopped and advising of potential delays lasting up to two hours.
As emergency crews worked to clear the scene, the situation remained fluid. By 5:57 AM, the signal alert was still in effect, and drivers were encouraged to seek alternative routes to avoid the traffic backup caused by this incident. Motorists should remain cautious and expect ongoing delays as the response teams continue to manage the aftermath of this traffic collision.