Application of railway signals

（重定向自Home signal）

Semaphore stop signals protecting the convergence of two tracks into one

Bi-directional signalling in evidence at Poyntzpass with a passing Enterprise on NIR.

Main signal

A main signal controls a train movement along a running line main line. A 'proceed' aspect on a main signal indicates that the line is clear at least as far as the next signal, giving the driver confidence to run at speed. Trains running long distances, especially passenger trains, will usually travel throughout under the authority of a succession of main signals.

单词	Home signal
释义	Home signal 英语百科 Application of railway signals （重定向自Home signal） Main signal A main signal controls a train movement along a running line main line. A 'proceed' aspect on a main signal indicates that the line is clear at least as far as the next signal, giving the driver confidence to run at speed. Trains running long distances, especially passenger trains, will usually travel throughout under the authority of a succession of main signals.
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