Bridge four-lane highway on the upper level and a pair of railway tracks at the lower level. Tower Bridge in London is different example of a double-decked bridge, with the central section consisting of a low level bascule span and a high level footbridge. A viaduct is made up of multiple bridges connected into one longer structure. The longest and some of the highest bridges are viaducts, such as the Lake Pontchartrain Causeway and Millau Viaduct. A three-way bridge has three separate spans which meet near the center of the bridge. The bridge appears as a "T" or "Y" when viewed
London Bridge Is Falling Down then adapted to fit the most famous bridge in England. One of the earliest references to the rhyme in English is in the comedy "The London Chaunticleres", printed in 1657, but probably written about 1636, in which the dairy woman Curds states that she had "danced the building of London-Bridge" at the Whitsun Ales in her youth, although no words or actions are mentioned. Widespread familiarity with the rhyme is suggested by its use by Henry Carey in his satire "Namby Pamby" (1725), as: <poem>"Namby Pamby" is no Clown, London Bridge is broken down: Now he courts the gay Ladee