So, if Scotland had a thousand speed cameras, could 2 lives a year be saved?
Probably not: 1) The chances that the speed cameras would be in just the right location (even using a thousand of them) is very small. 2) Even if in the right place, speed cameras don’t prevent all speeding. 3) If the investigating officer believed that “exceeding speed limit” was only “possible” in these cases, then speed cameras may not have changed the outcome anyway. 4) These investigations still don’t tell us whether those collisions involved stolen cars, criminals, the emergency services, joy riders, foreign drivers, drivers who have not registered their vehicles correctly or illegal / illegible or cloned number plates etc. 5) The drivers may also have been drunk. Do speed cameras prevent drunks crashing? 6) Speed cameras may have negative side effects that are larger than any benefit they provide (GB road safety). Motorcycles and mopeds make up less than 1% of vehicle traffic, but their riders suffer 14% of the total deaths and serious injuries on Britain’s roads. Is this becaus
