A behavior/personality test for driving licenses? What could possibly go wrong with that? Being impatient doesn’t mean you are more likely to commit a crime. Perhaps increase the penalties for reckless driving. Personality tests get into some dangerous territory. Besides doing a personality test at scale is hard to do with any accuracy. You simply answer the questions in a “correct” way. And gave to face psych evaluations would be impossible to do at the scale of the DMV. Where are you going to find the mental health professionals to staff such an initiative? And normal clerks couldn’t do the evaluation because they wouldn’t have the professional training or licensure to conduct screenings. If they did have those creds, they wouldn’t be working at a DMV.