Dollars to donuts the individuals wanting to “express” themselves are vastly fewer than the participation required to justify the costs of making ATV parks or whatever it is you are suggesting.

There’s already an insane number of dirtbikes / quads ripping by the hospitals in new haven. Even if you added areas for taxpayers to “express themselves”, how would they get there? Would they again use the same roads as cars, minus insurance and vehicle registration, while popping wheelies?