VIDEO - The Science Behind Low Level Speeding
This video from the Motor Accident Commission of South Australia explains clearly how the risk of a crash increases significantly with only a slight increase in speed. For me, the most interesting point is the idea that we tend to discount the risk because we disregard the speed limit frequently and nothing happens to us.
One look at the Collision Counter on this site shows that this is not so. Crashes happen to a lot of us every day here in British Columbia.