Classification yard

Chicago and North Western Railway's Proviso Yard in Chicago, Illinois, December 1942.

CNW towerman R. W. Mayberry operates the retarders at Proviso Yard in Chicago, Illinois, May 1943.

Not all cars can be sent over a classification hump. This Union Pacific track maintenance vehicle is permanently labelled

A classification yard (American and Canadian English) or marshalling yard (British, Hong Kong, Indian, Australian and Canadian English) is a railway yard found at some freight train stations, used to separate railway cars on to one of several tracks. First the cars are taken to a track, sometimes called a lead or a drill. From there the cars are sent through a series of switches called a ladder onto the classification tracks. Larger yards tend to put the lead on an artificially built hill called a hump to use the force of gravity to propel the cars through the ladder.

单词	Gravity yard
释义	Gravity yard 英语百科 Classification yard A classification yard (American and Canadian English) or marshalling yard (British, Hong Kong, Indian, Australian and Canadian English) is a railway yard found at some freight train stations, used to separate railway cars on to one of several tracks. First the cars are taken to a track, sometimes called a lead or a drill. From there the cars are sent through a series of switches called a ladder onto the classification tracks. Larger yards tend to put the lead on an artificially built hill called a hump to use the force of gravity to propel the cars through the ladder.
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Gravity yard

Classification yard