In fairness, I think the best way to fix (a), (b) and (c) would actually be by automated buses or trains, that would enforce reasonable limitations strictly, wi

In fairness, I think the best way to fix (a), (b) and (c) would actually be by automated buses or trains, that would enforce reasonable limitations strictly, without the possibility of negotiation. i.e. the passenger would be prevented from boarding the vehicle without a valid ticket and provided there was sufficient capacity for a speedy and comfortable boarding.