My campaign against these dangerous obstructions will not abate. Speed cushions destroy the hidden inner shoulders of car tyres, leading to unforeseen blowouts that could be at high speed later in a car's journey. Speed humps and cushions destroy car suspension springs. Speed humps cause damage to car sumps. Elderly people trip over speed cushions crossing the road and break their legs. But the strongest argument against them is that the pounding from vehicles rising up over them then crashing down the other side destroys the sub-structure of roads, leading to potholes all around them and hugely increasing road maintenance costs, which we as a country cannot afford (and which is why our roads are in such an appalling state). There is also evidence that tremors from vehicles crashing over speed humps sends shockwaves into the walls of buildings adjacent to roads, sometimes leading to collapse. The answer, as I have proposed many times, is sections of roads completely block paved from wall to wall with no separate footways. These sections need only be a 100 feet long, but have been proven (in Holland) to disquiet drivers sufficiently to slow them right down, and protect any pedestrians in the vicinity, without dangerously damaging vehicles or the sub structures of the roads themselves.