ANCHORAGE -

A Tok man died Tuesday afternoon when his pickup truck rolled over on the Alaska Highway, according to Alaska State Troopers.

In a Wednesday AST dispatch, troopers say they were informed just after 1 p.m. Tuesday of the single-vehicle crash involving 55-year-old Michael Verhoff at Mile 1357 of the highway, about 44 miles away from Tok toward Delta Junction.

“A trooper and Tok (emergency medical services) responded. The driver, (Verhoff), was reported deceased on scene,” troopers wrote.  “Verhoff was driving a 2008 Ford F-150 truck when he crashed.”

AST spokesperson Megan Peters says the road area where Verhoff's wreck occurred appeared clear at the time.

"It's a long, straight stretch -- there's no obvious obstacles," Peters said. "He was not wearing his seat belt at the time and he was ejected."

Peters says no obvious signs of drugs or alcohol were found in the wreck, but the state medical examiner's office will perform an autopsy and generate toxicology reports to determine whether sleep or medical issues may have been involved.

"There's no obvious sign of what caused him to wreck," Peters said.

Troopers from the Alaska Bureau of Highway Patrol in Fairbanks responded to investigate the crash. Verhoff's next of kin have been notified.