I think with AR more common we'll all be able to 'tag' other drivers. So drivers who have a bad reputation will be flagged.

I imagine a system in which 'poor driver' tags would decay with time. Data is shared.

Would be neat for self driving cars to update this data in real time, so you could see a data overlay of their decisions and intentions. A long green arrow would show their intended path, icons show you if they have seen you, timers counting down e.g. I'm pulling away in 3, 2, 1 ... now

AR is going to be fun.