((a)) ** .—** In this chapter, “vehicle” means a car, locomotive, tender, or similar vehicle.

((b)) ** .—** This chapter does not apply to the following:

((1)) a train of 4-wheel coal cars.

((2)) a train of 8-wheel standard logging cars if the height of each car from the top of the rail to the center of the coupling is not more than 25 inches.

((3)) a locomotive used in hauling a train referred to in clause (2) of this subsection when the locomotive and cars of the train are used only to transport logs.

((4)) a car, locomotive, or train used on a street railway.