This isn't an issue with traffic, but city planning, not allowing pedestrians to actually have the right of way, and poor policing of laws. You can build tunne

This isn't an issue with traffic, but city planning, not allowing pedestrians to actually have the right of way, and poor policing of laws. You can build tunnels and overpasses for pedestrians. Button-operated lights for walkways. Strict laws requiring vehicles stop for pedestrians. Planned speed bumps. You can route traffic away from paths kids would likely walk. Do things so that it is more reasonable that kids will be safe in neighborhoods, even if they are playing in the road (at elementary ages, of course, when they are old enough to be aware). You can also have more public green spaces within a child's walking distance where they can play outside with others and make sure school grounds are open for play when school is not in session instead of calling the police for trespassing.