Whose tires? My licence expired before I fled up here :3
Unfortunately, buses also tend to use tires. And roads. Maybe some melty mould would work, though! Maybe if it somehow targets cars or things used only/mainly by cars, or just use it later when places get walkabler as a response to the damn cars being rendered ineffective. Oh, and maybe light rail can be a bigger thing! Dunno how good that would be but fuck cars!