As for the 1), making streets much narrower and equally usable would probably help. Wide streets encourage mindless cruising as if nothing could happen, no matt

As for the 1), making streets much narrower and equally usable would probably help. Wide streets encourage mindless cruising as if nothing could happen, no matter what the speed limit. There have been a number of documented cases in Europe where removing all traffic signage in a dangerous crossing or a small town has caused the accident counts to plummet. If there are constantly pedestrians, bicycle riders, motorcycles, and cars on the very same road with no clear distinction between where each one should roam, everybody suddenly becomes super careful.