Speed bumps are hell on cars even when they are going slowly. This can reduce the wear on the suspension and ride components without removing the "Go slower" motivation of the bump
The Citroën C6 and the current generation C5 with hydropneumatic suspension senses the bump with the front wheels and sets up the rear suspension to absorb the bump almost completely.
Slightly more low-tech, but it works amazingly well in practice.
"Two cameras located at the top of the windscreen scan the streets and setup the suspension to absorb the bumps."
https://www.youtube.com/watch?v=RQsMfHg6jIE