Germany is not a good example, the highways are saturated, always under construction, speed limits are not respected and when you do not have speed limits, you have crazy people driving 190km/h+ thinking they can control their car and are driving safely.
Really, cars and speed limits are very particular in Germany, if Germans are normally very rational in the way they manage their life, they keep all their irrationality for their behaviour with respect to their cars.
Germany is a good example of a place with the offense rosser described. It is not a good example of how to design an efficient highway system. I think the main problem is the number of lanes. If there's a tiny crack in the pavement, they'll put up a sign saying strassen schaden (road damage) and rebuild the road for 1km in either direction, but it's rare to see an extra lane added. I don't really understand what they're thinking.
I've driven in Germany quite a bit. I've never seen an accident on one of the unlimited speed sections; all the highway crashes I've seen were near towns, usually with a 100km/h speed limit.
Really, cars and speed limits are very particular in Germany, if Germans are normally very rational in the way they manage their life, they keep all their irrationality for their behaviour with respect to their cars.