The term "railroad" when used in this act includes every commercial, interurban and other railway other than a street railroad, and each and every branch or extension thereof, by whatsoever power operated, together with all tracks, bridges, trestles, rights of way, subways, stations, tunnels, depots, union depots, ferries, yards, grounds, terminals, terminal facilities, structures and equipment, and all other real estate, fixtures and personal property of every kind used in connection therewith, owned, controlled, operated or managed for public use in the transportation of persons or property.