The link has to do with SUPERVISED walks to school. If you had seen the news item, there were even more than 2 parents accompanying the kids as they walked along and picked up other kids along the way.
My point more had to do with walking to school......I will walk my girl in the morning when it comes time since school starts early enough for me to walk her there and then walk back by myself. If my neighbors live here still then she and I can take turns walking her kids and my girl to school.