Comment by kolinko

It’s more about the road width/construction than posted speed limit.

If you have a road wide enough to drive 50 and try to post a speed limit of 30 drivers in all countries will complain.

If you design a road so that driving above speed limit doesn’t feel safe, drivers will naturally stick to it.

I can see it in city center Warsaw - we keep narrowing internal roads and the traffic naturally adjusts to that, whereas if a road is wider/longer/straighter people will drive faster regardless of the speed limit.

In US there is a higher disconnect between the posted speed limit and the road width.