35 Miss. Code R. § 4-13-04-101
"Motor vehicle" means an automobile, motorcycle, motor home, truck, trailer, semi-trailer, truck tractor and semi-trailer combination, farm equipment, or any other vehicle operated on the roads of this state, used to transport persons or property, and propelled by power other than muscular power, but the term does not include traction engines, road rollers, earth movers, graders, loading and other similar construction equipment requiring oversized tires, any vehicles which run only upon a track, bicycles, or mopeds. Motor vehicle does not include equipment such as bulldozers, motor graders, backhoes, front end loaders or any other equipment not used to transport persons or property upon the roads of this state.
35 Miss. Code. R. § 4-13-04-101