On PM (29.6.15), there was an item about the danger to pedestrians, especially blind pedestrians, from silent electric cars. Solutions were being sought in technology, e.g. artificial engine noises to warn of an approaching vehicle. Instead of these doomed, expensive attempts to treat symptoms, when will they learn to treat the cause of our road safety problems, viz. priority? Let the onus for road safety be on the driver, not the vulnerable road-user.