A.__A person on a properly registered snowmobile may cross controlled access highways by use of bridges over or roads under those highways, or by use of roads crossing controlled access highways at grade.

B.__The Commissioner of Transportation may issue special permits for designated crossings of controlled access highways.

A person who violates this subsection commits a civil violation for which a forfeiture of not less than $100 nor more than $500 may be adjudged.

4.__Unlawfully operating snowmobile on plowed road.__A person may not operate a snowmobile upon any plowed private road, or public road plowed privately without public compensation, after having been forbidden to do so by the owner thereof, the owner's agent or a municipal official, either personally or by appropriate notices posted conspicuously on that road.

A person who violates this subsection commits a civil violation for which a forfeiture of not less than $100 nor more than $500 may be adjudged.

5.__Operating snowmobile on public way.__Except as provided in subsection 4 and this subsection, a person may not operate a snowmobile upon the main traveled portion, the sidewalks or the plowed snowbanks of a public way.

A.__A properly registered snowmobile may be operated on a public way only the distance necessary, but in no case to exceed 300 yards, on the extreme right of the traveled way for the purpose of crossing, as directly as possible, a public way, sidewalk or culvert;

B.__A properly registered snowmobile may be operated on a public way only the distance necessary, but in no case to exceed 500 yards, on the extreme right of the traveled way for the sole purpose of crossing, as directly as possible, a bridge, overpass or underpass, provided that that operation can be made in safety and that it does not interfere with vehicular traffic approaching from either direction on the public way;