I know about the freight network.
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anyway, okay, right, if you can displace enough cars you can not build/tear up to save money. Each extra lane has marginal $
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if you are displacing cars as you describe then you are already way over demand, waste of time and money
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ie--adding railways when roads are already sufficient
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I was thinking about how America is at a point where it needs to rebuild/replace a ton of infatracuture anyway.
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And self-driving cars (IMO) will lead to mass non-ownership for fist time in a century. So we can rethink what to replace it with.
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self-driving cars will (afaik) still run on ordinary roads; you only need rail where roads alone can't cope w demand...
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...and in those places, you need road AND rail to meet travel needs
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think of it like the second deck on a bus, maybe--you don't remove the first level when you add the second, etc (weak analogy)
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