I exagerate when I say 120kmh ! but in the USA, you really can't drive fast because there are cops everywhere and at 160 kmh on an american highway, you can get a big fine. In France or in Italy you can be upset for your wallet from 100 kmh, and no need to specify for Germany
And that's the same on all the American roads which are often much bigger than European ones but where people are far more slower.