In this chapter:
(1) "Motorcycle" means a motor vehicle designed to propel itself with not more than three wheels in contact with the ground, and having a saddle for the use of the rider. The term does not include a tractor or a three-wheeled vehicle equipped with a cab or occupant compartment, seat, and seat belt and designed to contain the operator in the cab or occupant compartment.
(2) "Department" means the Department of Public Safety.