Investigators don't yet know why the victim's Chevy Camaro was stopped in the middle of the southbound highway near mile marker 63.6 in Mahwah shortly after 2:30 a.m. Thursday, New Jersey State Police Sgt. Philip Curry said.
What they do know is that the driver got out and a Kenworth dump truck rear-ended the Camaro, which then hit him, Curry said.
The Camaro continued off the road into a tree, the sergeant said.
A medical chopper was requested to take the victim to a nearby hospital with serious injuries he said.
The dump truck driver wasn't seriously injured.
Click here to follow Daily Voice Cliffside Park-Edgewater and receive free news updates.