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 (natural arch) London Bridge (natural arch) London Bridge is a natural arch on the coast of Torquay in Devon, England. London Bridge has been so called for centuries. In 1832, the writer Octavian Blewitt wrote in his "Panorama of Torquay" that London Bridge was an “absurd appellation”. London Bridge is situated to the East of Torquay, beside an abandoned limestone quarry, and below the South West Coast Path. It can be reached by a short diversion from the trail which leads down to the arch through woodland. London Bridge can also be seen from a viewpoint above the abandoned Dyer's Quarry on