Rollover

That caused the Ram to veer across the eastbound lane, exit the south shoulder of the highway and vault off a five-foot cliff.

The vehicle then flipped multiple times, coming to rest on its roof facing east.

Williams overcorrected, causing the vehicle to go into a slide.

The Wyoming Highway Patrol says the pair were in a 2005 Chevrolet Silverado westbound on Interstate 80 when the vehicle left the roadway shortly after 4 a.m.

The Toyota again left the pavement and entered the median, where it rolled several times before coming to a rest in the westbound lanes.

Driver fatigue is being investigated as a possible contributing factor in the crash.

A possible medical condition on the part of Ramsey is being investigated as a contributing factor in the crash.

Weather was clear and the road surface was dry when the wreck occurred.

Solis lost control of the Jeep, which slid off the highway to the right and rolled several times.

State troopers continued to examine the incident Wednesday afternoon.

The Chevrolet tripped and rolled an unknown number of times before landing on its wheels some 100 yards from the road.

Speed is being investigated as a contributing factor.