The term rolling stock in the rail transport industry refers to railway , including both powered and unpowered vehicles, for example , , coaches, private railroad cars and Goods wagon
. In the United States, the definition has been expanded from the older broadly defined "trains" to include wheeled vehicles used by businesses on roadways.
The word "stock" in the term is used in a sense of inventory
. Rolling stock is considered to be a liquid asset
, or close to it, since the value of the vehicle can be readily estimated and then shipped to the buyer without much cost or delay.
The term contrasts with fixed stock (infrastructure
), which is a collective term for the Rail tracks
, Railway signal
, Railway station
, other buildings, electric wires, etc., necessary to operate a railway.
Frisco and the Zephyr.jpg|Steam locomotive and diesel locomotives
DR1A Vilnius.jpg|DMU rolling stock
Hopper cars.jpg|American-style hopper car
DTTX 724681 20050529 IL Rochelle.jpg|Articulated with intermodal containers
In Great Britain
, types of rolling stock were given code names, often of animals. For example, "Toad" was used as a code name for the Great Western Railway goods brake van
while British Railways
wagons used for track maintenance were named after fish, such as "Dogfish" for a ballast hopper
These codes were telegraphese
, somewhat analogous to the SMS language
Great Western Railway telegraphic codes
Great Western Railway wagons
List of railway vehicles