Railway semaphore signal - Simple English Wikipedia, the free encyclopedia

File:Semaphore Signal on British Rail Southern Region Redvers.jpg

A British semaphore signal on the former Southern Region of British Railways

File:Mechanical-signalling-north-geelong.jpg

British style "somersault" semaphore signals in Victoria, Australia

One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted 'arm'.

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v t e Railway signalling
Block systems	Token • Train order operation • Centralized traffic control • Chinese Train Control System • Transmission Voie-Machine • European Train Control System • Radio Electronic Token Block • Automatic Block Signalling • Positive Train Control • Communication-based train control
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