Who needs a car in a modern city?

I have often thought that within city limits car use should be severely restricted. I like the idea of people only being able to drive smaller vehicles like smart cars unless they had to drive larger vehicles for licensed, business-related purposes. Also, people could get a permit, a day pass as it were, to drive their larger vehicles for some good reason, i.e. lugging furniture around or the like. I think shutting down specific downtown streets to cars in general (excepting buses and taxis) is a really good idea. Government St here in Victorialand comes to mind. I am sure that these ideas would probably cause people to label me as a "crazy person" however. Folks do love their cars.