By: Richard L. Smith
UPDATE 5:07 a.m.: According to DOT cameras, much of the delay has been lifted, and traffic appears smooth on that portion of I-80. 
New Jersey State Police are investigating a serious early-morning crash that left at least one person injured and caused the temporary closure of a major highway in Morris County on Monday.
The collision occurred around 3 a.m. in the westbound lanes of I-80 near mile marker 33.1 in Rockaway Township/Wharton.
Troopers and emergency responders arrived at the scene. They found a car had collided with a tractor-trailer, resulting in at least one person becoming trapped inside the vehicle with serious injuries.
A medivac helicopter was called to the scene to transport the injured individual to a nearby hospital for urgent care.
Traffic cameras from the NJ-511 Department of Transportation showed heavy delays on the highway at 4 a.m. as crews worked to clear the scene and investigate the cause of the crash.
The New Jersey State Police are leading the investigation, which remains active at this time.
Further details about the injured party or the cause of the accident have not yet been released.