What is a train signal called?

1. Semaphore Signals. The semaphore was the first railroad signal to use electricity. The original semaphores used a two-position arm/blade to alert train operators if they must stop and stay (horizontal position), or could stop and proceed with caution (vertical position).



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Signals may be of the searchlight, color light, position light, or color position light types, each displaying a variety of aspects which inform the locomotive operator of track conditions so that they may keep their train under control and able to stop short of any obstruction or dangerous condition.

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Fixed Signals are of two types: • Running Signal; and • Shunting Signal. There are two categories of Running Signals: • Controlled Absolute Signal; and • Absolute Signal. Absolute Signals must not be passed at Stop without the Authority of the Train Controller.

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The rearlights on locomotives, multiple units and railcars. To ensure that the rear of the failed train is always visible, all trains are required to display three red lights at their rear: two tail lamps plus the red portion of the destination roller blind.

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The railways use a train detection systems which can tell signallers exactly where every train is and how fast they are going. There are also systems that can automatically stop trains if the driver doesn't take the correct course of action or passes through a red signal.

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