It's a thought, but unfortunately any member of an 'authority' is going to be in harm's way with a real criminal. Remember that (as an example) the son of sam and the oklahoma city bomber were both caught because of ticketing, and that a great many felons (like, actual felons that we care about, not the 'felons' of trump gang (tm) that have the wrong skin color) are encountered on traffic stops. I wouldn't want kindly and vulnerable meter maids to be expected to interact with people who have everything to lose, or hostile sovereign citizen types.
If a traffic enforcement type were to work, they'd have to have the authority to detain, and that inevitably means conflict with someone. I'd rather it not be with meter maid sally, and rather with officer dickstain, where I'm happy if either or both party gets hurt.
Closest analogous conflicts I could imagine would be when the us bombed eastern europe. Urban areas would be bereft of food and incoming supplies, rural areas would be bereft of most foods and incoming supplies, and everyone devolves into roving gangs and desperate attempts to fortify an area of 'trusted' neighbors.
Reading the first hand accounts of what people went through is enough to make me horrified whenever anyone talks about the possibility of a civil war with glee. They don't have the imagination or the knowledge to comprehend what neighbor vs. neighbor really looks like.