The problem with saying that areas are car free except for disabled people, which is what a lot of people say, is that it's not actually physically possible - the area ends up being arranged in such a way that driving a car is extremely slow and dangerous.
I know this is what some people want, of course, it being extremely inconvenient to drive, and to them it really doesn't matter if the inconvenience affects everyone, not just wasteful bastards.
Ghent is the same as other Dutch and Belgian cities - fantastic for cyclists, absolutely fucking shit for people in wheelchairs.
I don't know why they decided to just completely fuck over people with mobility problems when changing to priority for cycles, but they did.
But everyone holds those cities up as examples to follow.
Majorly improving public transport is the main change to make. There's not much point talking about banning cars or even massively discouraging them until there's a viable alternative on offer. The cost of driving lessons, fuel, etc is already a pretty major disincentive.