A snowmobile may not be operated on a public highway excepting the following:

• A snowmobile may be operated on the right-of-way of a public highway (except a limited access highway) if it is operated at the extreme right of the open portion of the right-of-way and with the flow of traffic on the highway. Snowmobile operated on a road right-of-way must travel in single file and shall not be operated abreast except when overtaking or passing another snowmobile.
  
• A snowmobile may be operated on the roadway or shoulder when necessary to cross a bridge or culvert if the snowmobile is brought to a complete stop before entering onto the roadway or shoulder and the operator yields the right-of-way to an approaching vehicle on the highway.
  
• A snowmobile may be operated accross a public highway, other than a limited access highway, at right angles to the highway for the purpose of getting from one area to another when the operation can be done in safety and another vehicle is not crossing the highway at the same time in the immediate area. An operator must bring his/her snowmobile to a complete stop before proceeding across the public highway and must yield the right-of-way to all oncoming traffic.
  
• Snowmobiles may be operated on a highway in a county road system, which is not normally snowplowed for vehicular traffic; and on the right-of-way or shoulder when no right-of-way exists on a snowplowed highway in a county road system, outside the corporate limits of a city or village, which is designated and marked for snowmobile use by the county road commission having jurisdiction.