Even hotter tip: on a highway, if the line on your right is free, switch to it. Left line(s) is only for overtaking.

Once drivers learn this simple rule, speed limits can be lifted on certain highway parts so whoever wants to go faster now can fulfill their desire.

Edit: I did check few stats about fatal car accidents. I am very surprised that Germany has many road sections without a speed limit and is #15 on the least fatal car accident country, while US is #114. In fact, Germany's fatality rate on the road been steadily decreasing since 1970s with a slight increase at 1991-1992.

Funny how the country that has no speed limits and mostly 3 lines per direction roads is one of the safest countries to drive in. US should take notes.