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
Albert Bridge, London weaknesses, the bridge was ill-equipped to cope with the advent of the motor vehicle during the 20th century. Despite many calls for its demolition or pedestrianisation, Albert Bridge has remained open to vehicles throughout its existence, other than for brief spells during repairs. It is one of only two Thames road bridges in central London never to have been replaced (the other is Tower Bridge). The strengthening work carried out by Bazalgette and the Greater London Council did not prevent further deterioration of the bridge's structure. A series of increasingly strict traffic control measures have been introduced to limit its