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Re:Elon Musk's Boring Company Begins First Tunnel by arcticbull on Friday May 12, 2017 @03:02PM (#14326851)
You could make the case that trains are just autonomous, faster and more efficient cars.
Re:Elon Musk's Boring Company Begins First Tunnel by hinkley on Friday May 12, 2017 @03:15PM (#14326985)
How many people fit in a train car? How many people fit in cars that occupy the same space as a train car? Realistically, how many people will actually be in each car? (hint: 1)

Even if you fix the Two Second Rule by perfect automation, you still need order of magnitude more space.