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Abrasive altitude

We have a big safety issue here. White Van Man and 4 x 4 Gas Guzzlers do not have a problem, but for the smaller compact cars that this government want us all to change to, speed humps are a real danger, especially the pre-cast concrete ones which have a sharp uplift and edges. I cannot drive my Honda Jazz over the speed humps in Hollow Lane at any speed, but it does not stop me from riding my mountain bike up and down the lane. In doing so I am always encountering all sorts of debris from shock mounts, broken sections of plastic bumpers, nuts and bolts, etc. This morning whilst riding up I found part of a 10 mm x about 50 mm bolt, which I suspect had sheared off from the suspension of a car or van; therefore some one is driving round unknowingly with a defective suspension/steering which could create a fatal or serious accident. I stopped to speak to a resident of Hollow Lane who I know quite well and he said he had just had to have all the rubber bushes replaced in his reasonably new car.
What will it take to get this message over to people responsible for our roads?

Asked on 31 October 2009 by

Answered by Honest John
I am hoping to get the co-operation of a tyre company to test speed
cushions and compensate for the shameful lack of testing for tyre damage by the TRL. The average speed cushion is between 1,800mm and 2,000mm wide with a flat top of 1,200mm to 1,300mm, leaving a slope either side of 300mm to 400mm rising to around 80mm. This means that no car can straddle them without its tyres being forced downwards and outwards on the slopes, and, depending on the abrasiveness of the material out of which the speed cushion is made, this gradually destroys the tyre inner sidewalls. In 2007 46 people were killed as a direct result of tyre failures, many of which were probably damaged by speed cushions.
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