Speed doest kill, it depends on who is driving at speed, i know a traffic cop, absolutely amazing driver, cruising speed down the motorway in a chase to catch someone is on average 120mph, he has never has a crash,
he spun a car off of the motorway in a pursuit the other day, the only damage he did to his police car was a tiny small black scuff,
just because the speed limit is 30mph, doesn't mean you have to go 30mph, what if children are at the side of the road,
part of the traffic police training, is to give a detailed commentary when they are driving, they look for things that i wouldn't,
speed in itself doesn't kill, speeding is something else, going faster than is permited by natural elements