Green River Star -

Either fatigue or an unknown medical issue are the causes of a fatal crash west of Rock Springs.

According to the Wyoming Highway Patrol, they were notified of a crash took place at 12:16 p.m., Jan. 28 near mile marker 99 on the westbound lane of Interstate 80.

The driver, Joseph E. Conway, 60, of Nashua, N.H., was driving a 2016 Volvo Conventional tractor-trailer, which has drifted off the right side of the road.

Conway then overcorrected the vehicle to the left, which resulted it to leave the road and overturn. Conway was wearing his seatbelt at the time of the crash. He was taken to Mem...