(Woodbridge)-State Police say a man is dead after a tractor trailer and a car collided on I- 95 in Prince William County early Sunday morning. According to the investigators, the crash happened around 5 a.m. when troopers responded to the two-vehicle crash. While the driver of the sedan was being treated by medical personnel at the scene of the crash, he left the ambulance and ran away on foot. State Police are following up on several leads to find him.