Posted Oct 16, 2010, 8:58 AM
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Registered User
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Join Date: Jan 2006
Location: Calgary
Posts: 2,402
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Is it extreme changes in elevation that is the main reason for them? For a moment, imagine using one up Centre Street instead of considering tunneling an LRT. It would be much cheaper, still give you grade separation, and would require very expansion of the existing ROW.
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