“You can combine bus routes so if a family has twins a boy and a girl (Or more likely children a year apart), but they go to seperate schools, the school bus can pick them both up and drop each off at their respective schools, this is more efficient and money saving. “
This is a claim that is completely without merit. It would only make sense if the two schools are nearby and have laddered start times.
However it makes no sense to have a bus route that has many pick ups as well as many different drop offs. That will not work, nor be more efficient or time saving.
Further, you assume that the busses are running half empty, which does not seem to be the case.