We’ve been conditioned since infancy to ignore most of these fatalities, along with the behaviors that cause them. If you’re a typical American, your first experience of speeding was while strapped into a car seat, and you rode past half a dozen fatal accident scenes before speaking your first complete sentence. A lifetime of exposure has convinced us to normalize, dismiss or ignore most traffic violations, to the point where we routinely exceed the speed limit despite the knowledge that speeding causes more than 30% of all traffic fatalities.