In the United Kingdom and in Australia, a bay platform is a dead-end railway platform at a railway station that has through lines. It is normal for bay platforms to be shorter than their associated through platforms.
Bay and island platforms are so named because they resemble the geographic features of the same name.
Examples of stations with bay platforms include Carlisle railway station; Nottingham railway station (pictured), which has a bay platform inset into one of its platform islands; and the San Francisco International Airport BART Station which has three bay platforms, two of which are in use. Chicago's CTA O'Hare Airport Station features a bay platform with one track on the bay and a track on each side of the platform. The Hoboken and 33 St Stations on the PATH train line have bay platforms. Ferry Avenue on the PATCO Speedline also has a bay platform. However, in the New York City Subway, such platforms are thought of as side or island platforms connected at the ends, rather than bay platforms.
Trains which use a bay platform have to reverse direction and depart in the direction from which they arrived.
Dock platforms are similar to bay platforms but are generally shorter and used to unload freight.
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