@Axel-Härtl
Don't you have those diversion signs in Germany, like we have in the Netherlands, that direct you around the location of the roadworks when there are roadworks somewhere?
Or do you mean, for example, roadworks that suddenly appear without clear prior notice?
I get the point about having a button or function in MRA that allows you to bypass roadworks. Last year in Belgium, I experienced 3 or 4 times that roadworks suddenly appeared that hadn't been there a week before my tour. It is annoying, but stopping for a moment and checking how to get from A to B is, in my opinion, perfectly doable.