Where are these parking spaces going to go? There aren't enough parking spaces for the cars people own at the moment.
I have a friend who lives in a residential street in Edinburgh, fairly central. The pavements of these streets are lined with parking spaces which are labelled "resident permit holders only". Parking there to visit a nearby shop is a nightmare, because the very few non-residents spaces are in heavy demand. You'd think that the residents themselves would be OK though? Not a bit of it. My friend insists on leaving to go home by 6.30 at the latest, because he says that if he gets there after seven he usually can't find a space, despite having paid several hundred pounds for a permit.
There has to be a better way.