All the final cars have already been developed, they've just fallen out of regulations on the grounds that "traffic safety" is mostly understood as making sure you can wrap your Mercedes around a tree at 210kph and survive.

All the safety regulations of course have been to the detriment to every other road user, including other cars, but we've taken the eternal arms race of the killdozers as granted since the 60s and we sure as shit ain't stopping now