I agree that even in a small city like Boston it’s reckless to have uncontrolled intersections, precisely because people don’t know the rules of the road.

My comment was a response to ‘I asked how people are supposed to know to stop (or not to) and he replied, "you just know". It baffled me because _clearly_ you don't just know.. because I was there and I didn't know.’

When I got my license in New York I studied for the written test from a booklet that the DMV gave out. This exact situation was in there. It’s not complicated. But you’re right, there will be accidents, because, even though there are still driving tests, people drive around with “red means stop, green means go” as the only rule that’s stuck in their heads. At least in the US.

I did a bunch of driving in France and what struck me most was the near complete absence of stoplights and even stop signs. Where I was, admittedly smaller places, big intersections are usually roundabouts, and smaller ones have a yield sign or follow "priorité a droit" which is basically a 4-way yield where you yield to the person on the right.

I don't know the traffic accidents stats, but overall the system really does rely on people knowing the rules as opposed to signalization, and it (mostly) seemed to cut down on time spent waiting.