Germany has a ratio of 3.9 deaths per 100,000 people, while America's ratio is 12.4 per 100,000—essentially 4x higher. And they have the autobahn. Not like they are driving slower.
They drive with a discipline / care that Americans refuse to even consider. Perhaps Americans should.
I’ve been to the US and Germany only once. In Berlin I didn’t drive, but saw the weirdest thing multiple times: when the traffic lights turned green sometimes the drivers of the cars up front would just go flat out, tyre screching and all, only to stop at the next traffic light 100 meters away. Really odd.
On the other hand I had to drive many kilometers (sorry, miles) in the US and thought everyone was well behaved, didn’t experience any tailgating, reckless driving etc.