Well known entrepreneur Richard Branson has had a bad accident caused by a speed hump. When cycling in the British Virgin Islands he hit a speed hump and suffered a cracked cheek, torn ligaments and extensive bruising. He claims only his cycle helmet saved him from death.
He said: “I was heading down a hill towards Leverick Bay when it suddenly got really dark and I managed to hit a sleeping policeman hump in the road head on. The next thing I knew, I was being hurled over the handlebars and my life was literally flashing before my eyes. I really thought I was going to die. I went flying head-first towards the concrete road, but fortunately my shoulder and cheek took the brunt of the impact.”
This writer has of course campaigned against speed humps over many years and this is not the first example of the danger speed humps cause to cyclists. There was a very similar case in the London Borough of Bromley in 2005 which is documented here (fast cyclist on a hill in poor light conditions): http://www.bromleytransport.org.uk/Old_Hill_Accident.htm (and there is lots more information on the dangers of speed humps on that web site).
With the negligible road safety benefits of speed humps, simply in the interests of improving safety for cyclists would it not be a good idea to remove them all?