80/20 rule of networks
Anyone who works in IT, or who is a traffic engineer, knows of the 80/20 rule of networks. The 80/20 rule is simple, it states that on any given segment of a network, 80% of the traffic is local. The exceptions for this rule are rare.
Collision studies show that 80% of crashes and collisions occur within 5 miles of one's home, that is they occur locally. That is because 80% of our trips, and therefore 80% of our time, is spent within those five miles.
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