Compulsive Breakers
It's true 60 percent of traffic jams occur for little to know actual reason other than improper reactions, lethargy and an imaginary sense of "pace" . Granted, god hasn't given us automated causeways yet so the task to gauge and process distance, rhythm, and speed still falls largely onto the human brain.
Try and resist hitting your breaks unless its absolutely necessary because the very act of tail light illumination can cascade backward until it eventually effects traffic patterns in other countries. Now I'm all in favor of setting "The Ruskies" back 200 years by systematically impacting their traffic progressions but they have the freaking AUTOBAHN over there. Its like a giant car river that has no speed limits and a death toll in the millions. They don't care because they're top priority is... getting there.
Do your part to keep America's roads moving.