unlike Germany where the autobahn works quite well. But their licensing systems is far more rigorous, and they know better than to stay in of the left lane except when passing other cars.
Only partially a matter of knowledge.
Of course that's an offense that can and frequently is fined.
The major differences between the US and Germany are others though.
Essentially it comes down to driving in busy city traffic and driving very fast in the countryside or on a mostly open highways demand very different skills.
The US has an abundance of citydwellers who have to maneuvre city traffic skillfully on a daily basis and who, once they find themselves on a deserted highway (cue: Nevada), overestimate their competence.
In Germany cities are smaller and more dense which has two results:
1) More citydwellers don't have a car (or license to begin with).
2. Those who do are exposed to countryside driving (or open highway driving) more frequently.
Other things factor into that, too. Europe being a small place people driving places more frequently when Americans would fly etc.
But their licensing systems is far more rigorous,
The positive side effects not withstanding this is somewhat infamous in Germany cause it's for a large part a result of educators pressing for that (continuous expansion if it was to go their way), thus expanding their revenue base.