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 as a "West End terminus". This line opened on 1 May 1844 and most of the services from these two companies were withdrawn from London Bridge, leaving only the Greenwich and Brighton companies using London Bridge station. The Greenwich company was on the brink of bankruptcy and so was forced to lease its lines to the SER, which took effect from 1 January 1845. The next year the two companies, along with other small railways, merged to form the London Brighton and South Coast Railway (LB&SCR). Consequently, there were only two companies serving London Bridge. The LB&SCR used the unfinished