Probably one of the lesser-known LEGO railroad-related products was a series of monorails. However, they're technically not monorails, but that's what LEGO called them. Anyway, here's a video showing a city that uses the pseudo-monorails.
That is one Cool video, and you know it took some extreme Geeky-ness, to assemble such a diverse City.............:wave: Thank for sharing with us.............