> Then there’s also the the objectively atrocious driving record of Americans.
I think as in most things, the higher the penetration, the worse the average will be. If you give every moron in the country a car, the average will be pretty awful, the us just has high penetration. As a European it's always shocked me that in the us even borderline retarded people have cars. In Europe that's less so the case because those people usually can't afford to buy a car.