That's pretty much it. The other city tracks are loosely based on the real cities abut as far as I know there are no actual configurations like them.
Some of them are in fact quite odd. I tend to look at the road, not the scenery, so I've probably missed some things. For instance, I'm wondering how it's possible for Grand Valley to cross that body of water once on the big bridge, but not on the return side of the track.
Welcome to GTP, B!