IMHO, facts don't sell anything. Defining an option as better isn't sufficient. Disincentives for the status quo are not necessarily taxes or legislation. A powerful disincentive is "missing out" on a "movement" or "being left behind". Adding busses doesn't feel like a "movement", but car-less cities has a nice Green Dream ring to it that might garner support from the right demographics by allowing a moral high ground. There will be increasing disincentive pressure against neighborhoods that allow cars, by a migration of commercial business to car-less areas, perhaps, or a loss of property values in those car-packed areas. But for those disincentives to be effective, they should be given time in the spotlight.