Think it is something to do with price speed hump £200 set of Speed averaging cameras £Quite a lot. Both have the same effect.
Not quite. One generates revenue
Both generate revenue but for different benefactors, Cameras generated for the Government/Council/Police.
Speed bumps generate for garages and the spares department after you have shagged you shockers, or focced your alloy rim.
There are speed bumps going into a business/trade park in 'Waterlooville' Hampshire (That's where the Southern Bastards live) that I could not drive into when I had a MR2 Spider, she would ground out, front spoiler on hitting the bump and brake pipes and air con pipes when the front wheel dropped off the bump, the joys of a Mid-engine car.