Troopers responded to an accident in Randall County north of Canyon.
Just before nine Saturday morning a car was traveling north on I-27 near McCormick Road when it flipped into the median between the highway and the frontage road.
The 18 year old driver, Robert Manuelos of Amarillo, was ejected and then the car rolled on top of him.
He was pronounced dead at the scene about half an hour after the accident.
He was not wearing his seatbelt, but a passenger in the car was.