An investigation is underway in Roane County following a fatal accident that closed Interstate 40 East for hours.

The Tennessee Highway Patrol says 37 year-old Charles Isabell was driving a tractor-trailer when he ran off the road. When he got back on, he crossed over both lanes and then hit a rock embankment and was pronounced dead at the scene.

Another car was involved in Friday’s accident, it hit the tractor-trailer when it got back on the roadway but that driver was not injured.