Perhaps if we're going to continue to have highways through cities, containing their noise and emissions should be a priority rather than shifting externalities

Perhaps if we're going to continue to have highways through cities, containing their noise and emissions should be a priority rather than shifting externalities as various kinds of pollution onto neighbors and visitors. Build residences that are each bunkers with massive walls, airlocks, and HEPA filtration is probably not going to scale to all demographics very well. I think (the US) needs more public transportation that gets people out of single-occupant vehicles without imposing time, money, or practicality costs onto them.