[wpietri]

Our current version of this in the US is a system where there are a much smaller number of observers (cops). Too many bad observations and you face license suspensions.

In practice, the small number of observers means that there are plenty of bad drivers who have long periods of bad behavior with no negative feedback. Basically all I'm suggesting here is increasing frequency of observation while reducing the size of the penalty from "large ticket" to "mild shame".

It's also approximately equivalent to what happens in a small community. There if you are a bad driver, word will get around and eventually get back to you. That doesn't seem like a terrible dynamic to me.