I have to lay some of the responsibility of this onto the parents: if the child is unable to recognize the correct bus stop, then the parents need be waiting at the bus stop for the child, and need to instruct the child to stay on the bus until he can see the parent. If the child does not see the parent, he is to ride the bus back to the depot.
If the child is unable to follow this kind of instruction, perhaps the regular bus is not appropriate for the child.
To expect an employee (perhaps underpaid or overworked) to be as dedicated as a parent is usually too much to ask, although in some cases those employees care much more than the parents.
We had a discussion about responsibility and dedication following a child's drowning at work this year. At the time, there were no lifeguards on duty, the nine year old was in the water, and the parents were nowhere to be seen. One of the offshoots of the discussion was why we entrust lifeguarding to people to whom we are unwilling to pay more than $10/hour: if the work is so important, shouldn't the wage reflect that? And if the wage is an accurate reflection of our perceived value, shouldn't we be more responsible as individuals for the safety of our children?