A 71-year-old St. Marys man, Jerome J. Cavalline was traveling southbound on state Route 255 when he experienced a medical emergency on Thursday. He died as a result of that medical emergency, causing his vehicle to travel off the roadway and strike a parked vehicle and a sign. State police were assisted by the Fox Township Fire Department, Fox Township, Ambulance, St. Marys Ambulance, PennDOT, National Fuel Gas and the Elk County Coroner.