The need for buses & drivers can be cut back since all three school levels won't be coming and going at the same time. Currently you need 3 buses & 3 drivers to pick up kids from one stop. If they are time staggered, the same one bus & driver can come pick up the elementary kids, make a second trip to get the middle school and a last trip for the high school. And it doesn't have to be in that order, make the high school the first pickup and the elementary age kids the last.