Out and Back roller coaster

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Out and back simply refers to the layout of a roller coaster. An out and back coaster is one that climbs a lift hill, races out to the far end of the track, performs a 180 degree turn and then races its way back to the station.

Drop off the Comet, an out and back roller coaster.
Drop off the Comet, an out and back roller coaster.

This particular design is very popular and is easy to design and construct. With an out and back design the hills on the way "out" usually are quite large and gradually decrease in size. The hills on the way "back" are usually "bunny hills", or small hills created to maximize air-time.

[edit] Examples