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 Mills Bridge Ford Bridge have both been demolished since their inclusion on the National Register of Historic Places. London Mills Bridge The London Mills Bridge was one of nine metal highway bridges in Fulton County, Illinois listed on the National Register of Historic Places. This particular one was located along County Highway 39 as it spans the Spoon River on the north side of London Mills. It was added to the National Register of Historic Places on October 29, 1980, along with the eight other bridges, as one of the "Metal Highway Bridges of Fulton County". Some of the other bridges included