The Vernon County Sheriff's Department said a Westby man died in a one vehicle crash Wednesday afternoon near Coon Valley.
Sheriff John Spears said that their investigation determined that 68-year-old Thomas G. Davidson had some kind of medical emergency which caused him to lose control of his vehicle as he drove along Highway 14 and Hellwig Lane shortly before 2 p.m.
His vehicle went up onto a guardrail causing the vehicle to flip over. The vehicle came to rest on its roof in a ditch.
Despite efforts from emergency responders, Davidson was pronounced dead at the scene.
Highway 14 was closed for several hours due to the accident.