Oklahoma Highway Patrol troopers are investigating following an early morning accident at I-40 and Rockwell.
Troopers say the driver of a semi fell asleep, ran off the interstate, up the embankment and crashed into a car driving on Rockwell above.
The accident happened around 6:30 a.m. Friday morning.
Troopers have closed Rockwell which runs over I-40 while the clean up the wreckage.
The accident is not affecting traffic on I-40.
Troopers say the driver of the Saturn was taken to the hospital with minor injuries.