Great track. A couple of criticisms, though.
Firstly, the AI just seem to stand at the start line. They move eventually, but this could be quite frustrating if someone wanted a competitive race.
Secondly, and this is more of a question than a criticism; Is the road surface supposed to be that bumpy? It seems a bit over the top. Maybe the road mesh could do with some smoothing.
Looking forward to more updates as I can see this being a five-star track easily in the future.