The eastbound lanes of Interstate 40 in Wilson County were shut down for several hours Thursday following a two-vehicle crash involving a car and a semi-truck. The accident was reported around 6 a.m. at mile marker 246, east of Lebanon.
The Tennessee Highway Patrol said the car was traveling westbound when the driver is believed to have fallen asleep.
He crossed the median and struck the back axle of the semi's trailer, tearing off the trailer's rear axle and tires.
The truck traveled several hundred yards down the interstate before being able to stop.
The driver of the car was trapped in the vehicle for several minutes.
He was taken by LifeFlight helicopter to Vanderbilt University Medical Center in Nashville with serous but not life-threatening injuries.
The investigation into exactly what happened is ongoing.
All eastbound lanes of the interstate have reopened although the tractor trailer remains on the side of the road and traffic remains slow in the area.