Questions about plastic rail from a newbie

George you can double head, just requires some modification. Like my thomas,    
and the blue track is plarail/Tomy. It was just the older style, and the Trackmaster (brown) is the newish version and was replaced with grey track that is not worth purchasing. Tomy/plarail is tougher than Trackmaster in some criterias and they are both compatable. The Tomy/plarail line has real trains and thomas trains. I prefer Tomy, but which line you choose is up to you.