alt Hacker NewsNot in any parts of northern Europe where I drive. You are usually (exceptions exist) supposed to reduce speed very much below posted speed limit before passing the bump. For example, posted speed is 50kmh but speed bump is designed to be crossed at no more than 20kmh. If you drive a less comfort oriented car, make that 5kmh instead of 20kmh.
I drive mainly in Norway but hadn't noticed any difference in Sweden or Denmark. If you drive the posted speed here you can count that your wheels won't be knocked off. If you have to reduce speed (say around schools or near poor visibility crossing) then there is a sign for different speed, as simple as that.