Any Model Railroaders here??

I have never been in the hobby, but back in Cameron, MO where I used to live near, the local donut shop owner was a big time railroad guy, he had tracks that ran up high on all the walls, but what was so cool was he had working signal lights, whatever you call them, the BIG ones. and all sort of cool stuff like that! ya got to hear the cool "WOoooo WOooo while ya got your donut fix! ha