And when the weather is perfect and the snowplows always clear the roads on time, etc. There are too many variables. It's incredibly difficult to get consisten

And when the weather is perfect and the snowplows always clear the roads on time, etc. There are too many variables. It's incredibly difficult to get consistent on-time performance out of a train system which has far fewer variables to anticipate. It will never happen for cars even if they are self-driving.