> That also raises another point: as an example, we know that some drivers text while driving. Not all drivers do this; hopefully it's a minority.

I would be surprised if it was a minority. I am an extremely active pedestrian and cyclist in Toronto and if you pay attention to people in their cars stopped at red lights you'll find a majority will be glancing down at something. It could be a phone.. could be the radio.. could be something on their dash panel.. but when you start noticing how many people react to green lights based on hearing the car in front of them go rather than their sight (because their head is down) it doesn't make me optimistic that they're looking at anything other than their phone.