I loved in Germany that you could ONLY use the far left lane if you were passing, and big rigs were completely barred from using it unless otherwise stated. I appreciated the no speed limit in certain areas, but that being said Germans seem to have a much more rigorous driving test and drivers ed course than Americans from what my friend was explaining what he had to do (they intentionally fishtailed his car so he had to fix it, fixing hydroplaning at high speeds, etc).
in the state of nebraska trucks also cannot use the far left lane