Public transportation is the only answer for real safety. Everyone should be subject to safety searches and only allow passengers to carry-on food properly ID'd and bar coded. Of course all non-regular trips should have preapproval from the travel commission. people who fail on their healthcare payments, taxes or alimony, and those who show signs of dissent, should be put on the no-travel list.
The few vehicles that should be allowed to operate on the roads should be emission free with unionized operators.
it would be a big win for safety and it would save planet, who doesn't want that?