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 hybrid of three different design styles. It is an English Heritage Grade II* listed building. Built as a toll bridge, it was commercially unsuccessful. Six years after its opening it was taken into public ownership and the tolls were lifted. The tollbooths remained in place and are the only surviving examples of bridge tollbooths in London. Nicknamed "The Trembling Lady" because of its tendency to vibrate when large numbers of people walked over it, the bridge has signs at its entrances that warn troops to break step whilst crossing the bridge. Incorporating a roadway only wide, and with serious structural