NJ Transit Spokesman John Durso Jr. says the accident occurred around 11:15 a.m. Sunday in the area of Eighth Avenue in Belmar.
The motorist - whose name was not immediately available - was pronounced dead at the scene. Durso said no one on the train was injured in the accident, though it wasn't immediately known how many passengers were aboard. They were later put on buses to complete their journey.
The cause of the accident remains under investigation by NJ Transit police.