Don't overdo with by adding "meticulously maintained, pristine city", I mean okay this might be a side-effect once people start walking more and have the time to look at their environment close up and maybe even thrown their single-use coffee cup into a bin instead of out the car window. European cities were in most of their cores built before the car or didn't allow highways to cut them up, followed by more demolishment for parking space. Add zoning laws that only allow single homes with no business in their center and you get suburbian where you can only escape with a car.