I heart the autobahn. And would absolutely *love* an American instantiation. However, as we've all pointed out already, the current american driving standards and habits would not support an Autobahn. But, it is possible to remediate the issue in under a decade.
1. Training. We all agree. 'nuff said. License acquisition needs to be more than a joke.
2. Enforcement. I have a soapbox on this issue...which i will avoid the full extent of. But, speed is not the issue. Idiots who can't drive are. Tailgating, driving in the left lane, lack of signal use, failure to merge properly (cutting off or refusing to let another in), and rubbernecking. Love that about the autobahn. They don't pull the guy zipping around on the right when the wank in the left lane refuses to get over. They pull the one obstructing traffic.