That might fix the problem of kids walking and biking in the dark, but it still leaves the issue of the morning being the time when driving is the most difficul

That might fix the problem of kids walking and biking in the dark, but it still leaves the issue of the morning being the time when driving is the most difficult. Also I'm not sure you can push school start time back far enough to matter. School hours are generally shorter than adult work hours (especially for elementary school), so in a family where both parents work away from home you are going to have some time where the kids are out of school but the parents aren't home. I suspect that "kids get home a couple hours before the parents do" works out better than "kids leave home an hour after the parents".