What type of vehicles are considered "passenger vehicles" in South Dakota?

Under South Dakota law, a "passenger vehicle" is any self-propelled vehicle intended primarily for use and operation on the public highways, including passenger cars, station wagons, vans, taxicabs, emergency vehicles, motor homes, trucks, and pickups.  The term does not include motorcycles, motor scooters, motor bicycles, motorized bicycles, passenger buses, and school buses.  Farm tractors or implements of husbandry designed primarily or exclusively for farm operations are also not considered passenger vehicles.