A bicycle shall be, for the purposes of this section, any vehicle with three or less wheels and containing a saddle seat, and which is not motor driven. Any vehicle with three or less wheels and containing a saddle seat, and which is motor driven is considered a motorcycle or motorscooter for the purposes of this section. Any vehicle with ski(s) and a track-type drive designed for travel over snow is considered a snowmobile for the purposes of this section. Any unit consisting of a board with two or more wheels attached to the underside that is propelled by the use of a persons foot is considered a skateboard for this section. For the purposes of this section, any shoe-skate with four wheels is considered a skate, and any shoe-skate with three or more wheels attached in a straight line is considered an in-line skate. Any vehicle with three or four wheels and containing a saddle-type seat, which is motor driven is considered an all-terrain vehicle for the purpose of this section.