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 station Banister. During the first decade of the twentieth century LB&SCR station at London Bridge was again enlarged, but overall London Bridge station remained a "sprawling confusion". The chaotic nature of the station at the turn of the century was described in John Davidson's poem, "London Bridge": The South London Line from London Bridge to Victoria was electrified in 1909 with an experimental overhead system. It was successful and other suburban services were electrified including the line to Crystal Palace in 1912. Because of World War I, the line to Croydon was not electrified until 1920. The Railways Act 1921 led