Speed bumps exist to slow down vehicles, in this case for pedestrian crossing.
Do you think it is more useful to slow down a 1-2 tonne (or more) chunk of metal from 50 to 20 km/h or a combined 150 kg vehicle from 30-20 km/h? Which would be worse to get hit by? Which has the greater stopping distance? Which can turn to avoid obstacles faster?
What exactly do you consider insane about it?
Speed bumps exist to slow down vehicles, in this case for pedestrian crossing.
Do you think it is more useful to slow down a 1-2 tonne (or more) chunk of metal from 50 to 20 km/h or a combined 150 kg vehicle from 30-20 km/h? Which would be worse to get hit by? Which has the greater stopping distance? Which can turn to avoid obstacles faster?
Which, by virtue of not reducing its speed, is more likely to seriously injure a pedestrian: a car, or a bicycle?