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 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