61-3-432. Exemptions of vehicles not capable of operation on highways. Track-type tractors, other track mounted machinery and equipment, road rollers, and other similar equipment and machinery which cannot be self-propelled or towed upon the highways of this state and which must be transported by some type of hauling unit, are not subject to this chapter, chapter 4, part 1, chapter 6, chapter 10, part 2, or chapter 12, part 4.