It seems to have stopped being a thing in the US in the `90's, for whatever reason. I recall walking to and from school as a 1st grader, although everyone was d

It seems to have stopped being a thing in the US in the `90's, for whatever reason. I recall walking to and from school as a 1st grader, although everyone was doing it which made everyone inherently more likely to reach their destination. If I was in charge, I would set the residential speed limits to 20mph and have the Police enforce those speed limits 24/7.