Or maybe to enforce parking rules that make sense, e.g. keeping all lanes of a busy thoroughfare clear for moving traffic during rush hour; alternate side parking in snowy states to keep the streets drive-able.
> Or maybe to enforce parking rules that make sense,
Denver recently decided that, since the fine for parking in a tow-away zone is twice that of parking in a street-sweeping zone, and since one can be towed in order to enable street sweeping, then parking in a street-sweeping zone is really parking in a tow-away zone, and doubled the fine.
I'm pretty sure that while the parking rules are there to make sense and regulate the commons, their implementation is based on revenue maximisation.