One thing that doesn't help at all: cars. I grew up riding bikes and skating on our street. The street was almost entirely free of parked cars. That same street

One thing that doesn't help at all: cars. I grew up riding bikes and skating on our street. The street was almost entirely free of parked cars. That same street now would have a dozen parked cars most days. Some houses will have a car or two in their driveway and another couple on the street. All of those cars reduce visibility to the point that I wouldn't let my kids play unsupervised on that street - risk of a car reversing out, of the kids riding out of a driveway into a passing car, of a skateboard hitting a parked car, etc. Despite our best efforts, our kids are largely oblivious to the danger of cars. I don't know what's changed on that front.