Well the other thing to think about is that by raising the speed limit, you also increase stopping distance, (sorry for contradicting myself that eighth pint seems to have altered my judgment!) Although cars/bikes can stop in the same distance now from 80-0 and they could 10 years ago for 70-0, probaby even less, the thinking/reaction time people need is increased at 80 so you will need the same if not a larger gap between vehicles which obv people will ignore thus pogtentialyh causing a high accident risk
