I think the only explanation I've heard for this is that seatbelts are too expensive to put on every seat in a bus. Interestingly, on mine sites the buses all h

I think the only explanation I've heard for this is that seatbelts are too expensive to put on every seat in a bus. Interestingly, on mine sites the buses all have seatbelts and you're firmly instructed to put them on every time the bus starts moving.