I'm amused that all of the responses focus on the differences; but none seem to cover why they have to be that way. In general, I don't think there is a hard r

I'm amused that all of the responses focus on the differences; but none seem to cover why they have to be that way. In general, I don't think there is a hard reason for it? My argument would include many of the cities that have public transit will happily utilize the transit busses and trains for some of the same reasons. I think some of the more rural routes for schools will be a bit more than some transit authorities would want to cover? Though, that is probably a bit self fulfilling?