A 76-year-old Lewistown man died in a Tuesday morning crash on U.S. Highway 87, about halfway between Billings and Roundup, after losing control of his vehicle.
Deputy Yellowstone County Coroner Cliff Mahoney identified the man as Walter Franklin Williamson. He was not wearing a seat belt at the time of the crash, Mahoney said.
Williamson, who was alone in the 1986 tan Chevy van he was driving, was pronounced dead at the scene, the Montana Highway Patrol said. No other vehicles were involved in the crash, which was reported at 6:40 a.m.
Williamson was driving southbound when he reached a curve and the van went off the roadway to the right, the MHP said. When Williamson attempted to steer the van back on the roadway, he over-corrected and the vehicle went into a yaw across the roadway.
The van crossed both lanes of traffic and then drove off the left side of the road, where it rolled. The vehicle came to a rest on its tires.
The driver was pronounced dead at the scene. Drugs were a factor in the crash, the MHP said.
In addition to MHP, the Shepherd Volunteer Fire Department, the Yellowstone County Sheriff's Office and American Medical Response responded to the crash.