That's a good point. When you have full control of design from the ground up it is reasonable to automate. I meant trains on existing complex tracks that were

That's a good point. When you have full control of design from the ground up it is reasonable to automate. I meant trains on existing complex tracks that were not designed from the ground up for automation. There are not trains navigating legacy systems, because that requires more uncertainty handling than our current automation is capable of. When the track and switching system and track vicinity are all controlled and designed for automation then it is a significantly less complex problem with respect to automation.