Nine passengers from a Denver-bound Greyhound bus that rolled on Interstate 80 near Rawlins Sunday morning remain in the hospital.
The accident injured 39 passengers, but there were no fatalities.
The Wyoming State Patrol says there were 43 people on board the eastbound bus when it went into the median about 3:30 a.m. and tipped onto the driver's side.
The bus driver says he was blinded by snow kicked up by a passing semi-truck and couldn't see where he was going.
The injured were taken to a triage center and the Rawlins hospital. Three were later transferred to the Wyoming Medical Center in Casper with head injuries. Six remained in the Rawlins hospital with lacerations and broken bones. All the others were treated and released for mostly cuts and bruises.
The bus originated in Salt Lake City and was headed to Denver with stops in Evanston, Rock Springs, Rawlins and Laramie.
Greyhound sent two buses from Denver to retrieve the uninjured and those who could continue the trip.