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What is the left signal for?


Abba

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There are always signals on the right side,but sometimes there will also be one on the left.Why is that? And does the T/O have to follow those?

 

Usually the left hand signals are repeaters.

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There are always signals on the right side.But sometimes there will also be one on the left.Why is that? And does the T/O have to follow those?

Usually when the train is curving towards the right, a signal, which is usually on the right hand side (clearest to the T/O) would be blocked. So a signal is placed on the left hand side of the tunnel acts for the regular signal on the right. These guys are called repeaters. Otherwise, the T/O would not be able to see the signal on the right and stuff can happen.

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