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,
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