I note that there has been several letters concerning speed ramps in the Telegraph recently. Last December, I was involved in a minor shunt in rush hour traffic (the driver in the following vehicle failed to notice that I stopped). Everything was taken care of by the relevant insurance companies. As I travel by that route every day, and regularly get held up in the rush hour traffic, I had time to ponder what actually caused the accident. As it was December, it was dark by 5pm and all cars had their headlights on. I soon noticed that whenever a vehicle that was short but high off the ground went over the speed ramps, it caused its headlights to dazzle drivers of vehicles heading in the opposite direction (and flash in the rear-view mirror of cars in front). When I was stopped at the point where the accident took place, I realised that I was exactly in the right place to see what appears as a flash of the headlights from small 4x4s ascending a speed ramp in the opposite direction, and believe that it was this that caused sufficient distraction for the driver following me to fail to notice that I had stopped. I asked the Department for Transport for a copy of their risk assessment into the distraction caused by headlights of vehicles ascending the speed ramps, and was told that no risk assessment had been carried out, and that it was "illegal" for drivers to dazzle other road users. I replied, asking how one was to traverse the speed ramps without dazzling oncoming drivers, as it would also be illegal to extinguish the lights, to which they had no reply.