Yes, I gathered that you only had included the basis of the road, just, it's a completely different method than I would take myself(because I'm dim witted and have a hard enough time getting my head around the scalar nodes, nevermind all these vectors that everyone keeps banging on about!
) but, yes, it seems you're doing it a completely different way.
What would be nice is a self-enclosed road node, with shading already done, that could be dropped into a scene(you know how I like to keep things packed away inside a simple surface shader, or such) then that could be warped by any other shader that would take effect over the entire surface.
So many options and methods to think about. I'm about to take another TG break for a while, got other things needing attention at the moment but it's been a good few weeks of rediscovery again over here, keep it up!