Comment by BugsJustFindMe
15 hours ago
You cannot measure driver goodness (skill and vigilance) by looking at crash statistics, because crashes are definitively circumstantial. Most very clearly bad/dangerous/unskilled/unvigilant operations of automobiles do not lead to crashes.
Population level statistics let you look for statistical aberrations that you can’t detect at the individual level.
Further suppose you define “good driving” as a set of behaviors but failed to include narcolepsy or similar medical conditions in your definition, then some of your “good” drivers would represent a significant risk to the general public. Thus the actual criteria the defines good driver behavior is accidents.