They seem like a good idea, and to be honest when they first came about they probably were - but it seems like they want to put them all over the place. There's roads in my area which are 30mph zones, and there's speed bumps. It just seems like an obsession to me.
As others have said they don't even seem to slow people down, you get the boy racers who love 'em because it allows them to show off to their missus the performance of their 1.0 litre 8v 106
The worst thing is driving along, and someone is coming along in the opposite direction, so you move over only to hit the speed bump on the slightly wrong angle, and you feel your car smashing over it. I think to myself "Ouch, my poor suspension & tyres" and it makes me cringe every single time.
We have them in town too, I was talking to someone who drove in Spain and they said what happens there, is if you're going too fast in town then the traffic lights will change to make you stop. It seems like a !Removed! good idea to me, and I know it's something different but it just shows there are other ways to slow traffic down but traffic calming should only be used in known speed hotspots, at least that way it would keep the traffic moving on other roads and save money. I'm sick of paying all this money to the council, and they leave pot holes open for months but place new speed bumps in areas where you couldn't realistically speed anyway. Proud to be British eh?