The world's first "rolling" bridge is located on the Paddington Basin in London. Rather than a conventional opening bridge mechanism, consisting of a single rigid element that lifts to let boats pass, the Rolling Bridge gets out of the way by curling up until both ends meet.

 http://www.toxel.com/tech/2008/09/21/incredible-rolling-bridge-in-london/

"It's about time. Those old drawbridges were only good for dramatic car chases and drunk captains." -Gerard Blanton, Sergeant, Visual Specialist

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