You don't necessarily need psychological testing. For instance, just make it easier to lose a license. Minor speeding could come with a license suspension if such a penalty were less consequential.
Over there "dangerous driving" means license suspension for up to 3 years. Doing donuts, speeding and overtaking recklessly, running lights while endangering oncoming traffic.. Any of these are immediate suspension and hefty fine. +50km/h (or +30km/h for novices) is immediate suspension as well. We still got plenty of jackasses. Mostly young men. With or without licenses...
Yes of course, but I'm talking about a 6 month license suspension if you get a ticket for going 7 over, not a suspension after repeated severe tickets.
Many states automatically revoke your license if you get convicted of any moving violation under the age of 18.
IMO it's a dumb, inefficient drag net because being black and driving 5-over is not a strong predictor of whether or not someone will drunkenly drive off a cliff on their way to prom.