Comment by mac-chaffee

I see a lot of "just add more specifics to the rule" in here, but that's fighting a losing battle. There will always be another edge case, and the rule will end up being so long and complicated that no one will properly follow it anyway.

I think the solution is to put the goal of the rule right next to the rule. Maybe vehicles are banned to improve air quality, to improve pedestrian safety, to reduce noise, or some combination. Or maybe there really is no good reason, and the writer of the rule just enjoys power.

Reminds me of writing security policies. There will always be exceptions, but if you include the goals of each rule, your users are empowered to recognize when an exception is a good idea. Otherwise, you get either blind compliance or secret non-compliance.