Emergency services were called to the Princes Motorway, Mount Ousley, about 5.30 yesterday afternoon, after reports of a truck and car crash.
Police have been told the car hit the rear of a stationary heavy vehicle.
The male driver of the car died at the scene, while the driver of the truck was uninjured.
It happened just past Picton Road and closed the northbound lanes of the M-1 for several hours while Wollongong police carried out inquiries.
There were wet and foggy conditions at the time.
Photo source: WaveFM stock