Rolling stock

Rolling stock' is a collective term for the rail fleet; sometimes it is used for one vehicle. It describes all the vehicles that are used on a railway track. It usually includes both powered and unpowered vehicles, for example locomotives, hauled passenger vehicles and freight vehicles (coaches and wagons), diesel units, electric units and service stock. The term is sometimes used to refer only to non-powered vehicles, thus excluding locomotives. The term contrasts with fixed stock (infrastructure), which is a collective term for the track, signals, stations and buildings etc. necessary to operate a railway.