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
Taizhou Yangtze River Bridge bridge began. It would become the first 1,000-meter-span and 3-tower-continuous-span suspension bridge. The idea of multiple towers and the pylon suspension lines to connect them was to decrease the impact that river flow can have on the structure. Being the first of its kind, the bridge would influence and shape various studies on structural engineering.this would lead to resolutions to known issues and research proposals in the engineering field. For example, a reasonable method of a wind resistance test was developed based on the unique structural integrity of the bridge. As a result, the Ministry of Communication of China recognize