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Train stop

This article is about the train protection device. For the place where trains stop, see Train station.
A signal with associated trip arm in the raised position (circled)

Part of a railway signalling system, a train stop, trip stop or tripcock (sometimes called a tripper) is a train protection device that automatically stops a train if it attempts to pass a signal when the signal aspect and operating rules prohibit such movement, or (in some applications) if it attempts to pass at an excessive speed.


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Avtostop (dəmiryol) AZ Аўтастоп (чыгунка) BE Jízdní zarážka Czech Fahrsperre German Автостоп (железная дорога) Russian Автостоп TG Автостоп (залізниця) Ukrainian

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