#0 - Don't grant licenses to people who have no business operating motor vehicles, for any number of reasons.
It's way too easy to obtain a driver's license in the U.S., and a majority of holders don't respect the task, don't know the rules, don't pay attention, or worse, do actually understand those principles in theory, yet ignore them in practice anyway.
I'm reminded of this every time I venture out on the road.
And was doubly reminded of this last time I was called for jury duty, for a trial where the defendant, with a prior DUI conviction, managed to kill a person, and maim another, while doing it again, under a suspended and/or revoked license.
The trial was projected to consume multiple weeks, so multiple pools of potential jurors were called for evaluation. Judging by the size of the courtroom, probably 300-400 people.
Hundreds of people, the dozen empaneled, and the judge could have had their time spent in much more productive ways because it should have never gotten that far, from the start.
At least the DA got it right this time, and was pursuing a murder charge.
Safety regulators have the classic "treat the symptoms, not the disease" approach in trying to save the stupid from themselves, yet failing to prevent them from hurting others.