The speed bumps around my old neighborhood have a dip in the median exactly so that ambulances can avoid the bump completely. I was told that it's also a safety

The speed bumps around my old neighborhood have a dip in the median exactly so that ambulances can avoid the bump completely. I was told that it's also a safety concern, as sudden shocks when carrying, say, someone with a spinal injury could actually be life-threatening. (Un)fortunately, it's also perfectly possible for ordinary cars to use the dip, too, and thus not have to slow down really at all.