I think we all agree that driveways can cross the kerb. There’s just some confusion about terminology. To me “regular roads” excludes highway=service. Specifically, I counted barrier=kerb on highway=(motorway|trunk|primary|secondary|tertiary|unclassified|residential|motorway_link|trunk_link|primary_link|secondary_link|tertiary_link). These are likely mistakes in my view. Do you agree?
-Edit: if not, could you give an example please? Just trying to understand what you were saying about the tempo 30 zones with lowered kerbs on the street