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 all vehicles using the bridge were over the weight limit. In July 2006 the wide roadway was narrowed to a single lane in each direction to reduce the load. Red and white plastic barriers have been erected along the roadway in an effort to protect the structure from damage by cars. Between 1905 and 1981, Albert Bridge was painted uniformly green; in 1981 it was repainted yellow. In 1992 it was redecorated and rewired. This has added to its status as a London landmark. The bridge is painted in pink, blue and green to increase visibility in fog and murky