Senators commute thirty seconds between their offices and the chamber by electric subway cars that run along a tunnel under Constitution Avenue.

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Written evidence suggested the railway was operating by 1793 and Mr Griffin says they were able to prove the line must have run through the tunnel.

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"I can't wait until my name gets called, when I get to run out of the tunnel and just be where I usually (am), " Revis said.

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The tunnel will run from Ardwick to Manchester Airport.

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Rick Suhr has connected two steel Quonset huts, one with a long, narrow tunnel measuring 100 feet for the run-up.

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Even on a dry day, the MTA's 300 pumping rooms remove an estimated 13 million gallons of water from the tunnel network, just to keep the system dry enough to run.

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The Thames Tideway Tunnel will be the width of three London buses and will run for 20 miles from west to east London, connecting up the 34 of the most polluting sewer overflows.

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