And a scheme of heavy fines/suspension of operating privileges for those who endanger the safety other road users by careless or aggressive driving.
But when/how to catch them? The "beauty" of other bad behavior is:
1) Speeding is easy to document with radar
2) Invalid paperwork can be seen in expired stickers etc
3) Accidents involving cars are easy to document relative to the personal harm they cause (or usually don't cause), and, better, everyone & their insurance companies have a vast infrastructure for and habit of documenting them. Bad behavior results in photographs of damage.
Bike and ped stuff--particularly scary close calls-- is a mystery, poorly monitored, and we're not in the practice of documenting it--not that this is a good thing, just that it is a hard thing to fix. Cyclists (partly) address this with GoPros.
So far, it is too weird/expensive for pedestrians to be documenting themselves as they go (maybe in 5 years we'll all have have a drone hovering over our shoulders documenting our lives) but for now peds have even less of an infosphere around themselves.
If we had more city cameras pointed at crosswalks, maybe that'd help