[openrailwaymap] Rendering of Signals in the US?

Hello, 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: http://www.openstreetmap.org/#map=19/34.91807/-82.30554 Thanks in advance for any help anyone can provide! -- Tim Huemmer Webmaster & Owner RRPictureArchives.NET