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,
Third Bridge Third Bridge The Deputy Darcy Castelo de Mendonça Bridge, colloquially known as the Third Bridge (Portuguese: Terceira Ponte), is the second tallest bridge in Brazil, connecting the cities of Vila Velha and Vitória in the state of Espirito Santo. Spanning the mouth of Vitória's bay, which has many other features, including the Penha Convent, Moreno's hill, freight ships, coastline, islands and modern buildings, the bridge has become one of Espirito Santo's main landmarks. Construction began on the bridge in 1978 and was completed and 11 years later on August 23, 1989. The Third Bridge was so dubbed in reference to