Or, rather, no surface parking. What would it take for the U.S. (frex) to ban surface parking lots, in favor of either underground (my preference) or garages/towers? Tax them out of existence? Subsidize construction of underground lots or garages at malls? Both? Something else? Banning cars isn't an option, but better public transit is. (My choice, monorail. ) A Nazi takeover, or something like it, isn't an option, either. POD any time after 1900. Side note: Once it's done, what would you replace them with?