I have tried a few combinations of tags in order to try to get a signal icon to render on a railway line in the US.  Most of the working examples I have seen have been specific to countries in Europe.

I would like to know if this feature works, and if so how I can properly code the signals in order to make them show up on the map.

I have a few nodes setup here for testing purposed:

Thanks in advance for any help anyone can provide!
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