Ok, so what you are saying is that the bus service should be replaced by rail:

Predictable - No random traffic, vastly imporves reliabillity of the system.

Disaster resistant - Less traffic in the system means less impact of disasters.

Time tested - rail has been used for longer than cars/busses.

Cost effective - After a large initial investment the large capacity of the system compensates for the large cost.

Idiot proof - this does not exist, but rail gets close with a lot of added control and safety systems to improve safety and reliabillity.