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Subways in America | Extreme Engineering | Great-Engineering.com | Part 2

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Uploaded by on Jan 23, 2009

http://www.great-engineering.com

Subways in America- How do you overhaul one of the nation's oldest and most traveled subway systems without shutting down a city for several years? New Yorkers are finding out.

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  • Cool.

  • Reddit?

  • theres an answer to underground river subways it called elevated rail on the bridge

  • Watching these videos, makes you really marvel at the limitless potential of the human mind

  • Thanks for putting it up

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