That is one of my main concerns when I have to send my son to pre-school. He's 2 now so I have 1 more year to decide. Anyway, I have trained him to sit in a car seat. And would love for him to sit till he's much older. But I don't think it's practical for a transport to use car seats, then you will only be able to ferry 3 kids max. If not, at least the transport must emphasise on wearing seat belts at least. Too many kids cramp in a car with no seat belt, is a concern to me.
A wise man refrains from talking but a fool utters rubbish.