"You can't have busses roaming around with no way to turn them off remotely."

Hm? Not a single bus on the road in my city can be turned off remotely. There's never been one ever, since bus transport started. So why should, no, must, that be a feature of new buses?

Why do you think that they can't be turned off remotely? They all have over the air updates. Just push the update the bricks the bus.