I don't see how that's relevant - OP has made a claim about automatic trains not being possible in the US which isn't the case. You can make a valid (more inter

I don't see how that's relevant - OP has made a claim about automatic trains not being possible in the US which isn't the case. You can make a valid (more interesting) argument that some countries (e.g. China) are now ahead of the curve, or that automated by default isn't used but that's a different argument which the OP didn't make.