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Set of Points:
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In the golden (steam and diesel) era these points were manually (hand) operated, only a few are still in use today. With the advance in technology electrical machines have now replaced the old manually system.
- A Signal
A signal simply put is a robot next to the railway track and functions the same way as any robot on our roads. It is defined as an apparatus, which provides visual information to the driver of a train about the availability of a specific line, and whether is it safe to proceed or not. It is a communication system between a train driver and a control centre to:
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Regulate and safeguard the movements of trains at crossings or depending on circumstances.
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Ensure a safe distance between trains on the same line.
The following different types of signals are in use today:
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1. Colour light signals
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These are the automatic robots controlled from a CTC.
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2.Semaphore (mechanical) signals
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This type of signal is mechanically operated by means of pulling a lever. This signal is used to direct trains
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Travelling in the “up” or “down” direction.
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