One of the core problems with enforcement right now is that municipalities rarely impound cars because of unpaid tickets. So often you'll see that someone that caused a major fatality crash had thousands in unpaid fines.
I think if we just took away cars and licenses, and eventually throwing people in jail, it would have a huge positive impact.
We've normalized car culture so much that we forget how dangerous cars can be to pedestrians. And, we've built cities to favor cars over people. Prioritizing pedestrian safety will take a lot of work.
Japan values pedestrians. There, it's a 3-year prison sentence for drinking and driving.
I think if we just took away cars and licenses, and eventually throwing people in jail, it would have a huge positive impact.