A transfer track is a section of extra track used to store trains on a large roller coaster when they are not needed.
A transfer track allows the coaster to operate at full capacity in high season, and at a lower capacity on quieter days thus reducing the number of empty seats being cycled. Because trains can be stored on it, the transfer track also provides a maintenance area (some roller coasters have a separate maintenance shed as well as a transfer track).
Usually, a transfer track is accessed by a sliding section of track. Some roller coasters have sections of track which rotate.
On very large roller coasters, such as Bolliger & Mabillard roller coasters, a sliding piece of track moves with a train on it. Olympia Looping also employs this method.
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