Millennium Bridge, London people walking caused small sideways oscillations in the bridge, which in turn caused people on the bridge to sway in step, increasing the amplitude of the bridge oscillations and continually reinforcing the effect. On the day of opening, the bridge was crossed by 90,000 people, with up to 2,000 on the bridge at any one time. Resonant vibrational modes due to vertical loads (such as trains, traffic, pedestrians) and wind loads are well understood in bridge design. In the case of the Millennium Bridge, because the lateral motion caused the pedestrians loading the bridge to directly participate with the bridge,
Albert Bridge, London Albert Bridge, London Albert Bridge is a road bridge over the Tideway of the River Thames connecting Chelsea in Central London on the north, left bank to Battersea in South/South-West London. Designed and built by Rowland Mason Ordish in 1873 as an Ordish–Lefeuvre system modified cable-stayed bridge, it proved to be structurally unsound, so between 1884 and 1887 Sir Joseph Bazalgette incorporated some of the design elements of a suspension bridge. In 1973 the Greater London Council added two concrete piers, which transformed the central span into a simple beam bridge. As a result, today the bridge is an unusual