“Transportation facilities” means all facilities for the transportation of passengers and property to and over any toll bridge, tube or other highway crossing and the approaches to each end thereof, acquired or constructed, to be acquired or constructed, or in course of construction pursuant to this chapter. “Transportation facilities” includes terminals, stations, viaducts, rails, tracks, power stations, substations and equipment and power supply lines, storage yards, and the real property, easements, and rights of way upon which any of them are located or situated or which are necessary therefor, and equipment, signals and interlockers, cars and rolling stock, and franchises, rights, and privileges appurtenant thereto.