Imaginative in a lot of ways but there are a few problems with the solid barriers everywhere- scrape them even on quite an oblique angle and you come to a total halt, nosed right in at 90 degrees - completely unrealistic behavior, and very frustrating since AC has no reset button to straighten you up and the roads are so narrow for turning around.
IMO there are too many zones with very short straights and tight, narrow corners in town etc - more appropriate for a carting track, just a pain in a car.