A combnation of both? I easily go over speedbumps at 60km/h in the middle of a road (I slow down at min circle or such ones, but not for the speedbumps, but because I know the risks). IF I was a rule breaking speeder, I might go over them faster.
Then you get the bunch that complain about speedbumps messing up their suspension and such.
yes there are useless speedbumps out there you can cruize over. then there are ones that smack the bottom of your car and your head against the roof.
were not discussing half cameras or half bumps here are we?
a person needs to be aware of the camera too, even then if they are aware of it they only slow down for it at that small area,
much easier to have multiple speed bumps than multiple cameras.