If our society took a chill pill with all the 'stranger danger' fear mongering, we could simply let kids walk themselves to school, as was once common not too long ago.
It’s one thing to let your kids walk to and from school when you know there are lots of other parents around. It’s entirely another thing when you know the place is a ghost town until all the parents get off work and come back home.
School buses still exist too. Kids in rural areas can stand at the end of their driveway and board a bus without parental supervision, provided their parents aren't totally paranoid.