yard, where freight cars or wagons are detached from their locomotives, inspected for mechanical problems, and sent to a classification or marshalling yard. Switching yards, switchyards, shunting yards or sorting yardsyards where cars are sorted for various destinations and assembled into blocks have different formal names in different cultural traditions: Classification yard (US and by Canadian National Railway in Canada) or Marshalling yard (UK and Canadian Pacific Railway in Canada) Departure yard, where car blocks are assembled into trains. Car repair yard or maintenance yard, for freight cars. Engine house (in some yards, a roundhouse), to fuel and service locomotives. Transfer yard, a yard where consists are dropped off or picked up as a group by through service such as a unit train, but managed locally by local switching service locomotives. Unit tracks may be reserved for unit trains, which carry a block of cars all of the same origin and destination, and so as through traffic do not get sorted in a classification yard. Such consists often stop in a freight yard for other purposes: inspection, engine servicing, being switched into a longer consist, and/or crew changes. Freight yards may have multiple industries adjacent to them where railroad cars are loaded or unloaded and then stored before they move on to their new destination. Major freight yards in the US include the Bailey Yard in North Platte, Nebraska, operated by Union Pacific Railroad; Conway Yard near Pittsburgh, operated by Norfolk Southern Railway; and the Corwith Yards (Corwith Intermodal Facility) in Chicago, operated by BNSF Railway. Major UK goods yards (freight) include those in Crewe, Reading and Bescot, near Walsall; which are operated by DB Schenker and Freightliner. Coach yards Coach yards or stabling yards are used for sorting, storing and repairing passenger cars. These yards are located in metropolitan areas near large stations or terminals. An example of a major US coach yard is Sunnyside Yard in New York City, operated by Amtrak. Those that are principally used for storage, such as the West Side Yard in New York, are called "layup yards" or "stabling yards." Coach yards are commonly flat yards because passenger coaches are heavier than freight carriages, in the unladen state. Major UK coach stabling yards include those in Crewe and Longsight, Manchester, which are operated by various regional train companies. See also Classification yard Goods station List of rail yards List of railway roundhouses Traction