I’ve noticed this on Polish vs Czech roads (I’ve driven mostly in the mountains border regions of Czechia so this maybe local). Polish roads have gazillion of signs and usually you’ll see a lower speed limit sign just before the curve or a bend if it’s not supposed to be driven at the speed limit of the main road. In my opinion there are way too many signs and I feel—as another poster commented here—like a robot. On the other hand in Czechia on a small mountain road there’s a general limit say 90kmh or 70kmh and there’s no way you make the bends with that speed— it’s your responsibility to slow down.
I’ve seen a similar differences in another border regions, e.g. Switzerland-France or France-Germany. It almost seems like there are two schools of thoughts that different countries subscribe to.
I Drive much and Usually I and others get curves etc more intuitively. One has to be a really bad driver to not have a Instinkt for the speed necessary in curves.
Btw German driver here and I find German has a good equilibrium of signs . I have to drive to Paris and Milano for work . Those places are pure mayhem of signs and confusion. I can’t imagine a self driving car mastering some of those places.
Prague, on the other hand, is oversaturated with signs. I guess someone makes money on them, because some are clearly superfluous (Segway bans in distant neighbourhoods where no one ever drove a Segway; Segways were only a bane of the touristy center).
The reason why Polish roads have so many signs is because producing and installing them is an opportunity to make money :) And usually that opportunity goes to a company owned by a relative of some local politician ;)
I’ve seen a similar differences in another border regions, e.g. Switzerland-France or France-Germany. It almost seems like there are two schools of thoughts that different countries subscribe to.