What do the rings, bars, etc. found on some signals mean?

July 14, 2019, 2:57 PM
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Stop signals controlling the approach to goods yards or goods-only lines have a black ring fixed to the end of the semaphore arm. No corresponding indication is provided in colour-light territory. Similarly, semaphore signals controlling lines for dock platforms have a black semicircle (in the shape of a ‘D’) fixed to the end of the semaphore arm. Again, no corresponding indication is provided for a colour-light signal.

Two crossed bars in the form of a large ‘X’ attached to a signal of any kind (stop signals, shunt signals, etc.) indicate that the signal is not in use. The cross is often white for signals that have not yet been commissioned.

Source – IFRCA.org

 

 

 

 
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