Unless the context clearly requires otherwise:
(1) "Contract crew transportation vehicle," as used in this chapter, means every motor vehicle, designed to transport fifteen or fewer passengers, including the driver, that is owned, leased, operated, or maintained by a person contracting with a railroad company or its agents, contractors, subcontractors, vendors, subvendors, secondary vendors, or subcarriers, and used primarily to provide railroad crew transportation.
(2) "Passenger-carrying vehicle," as used in this chapter, means those buses, vans, trucks, and cars owned, operated, and maintained by a railroad company and primarily used to transport railroad employees in other than the cab of such vehicle and designed primarily for operation on roads which may or may not be equipped with retractable flanged wheels for operation on railroad tracks.