Verrazzano-Narrows Bridge Island with the rest of the city. Various issues delayed the start of construction until 1959. The bridge opened on November 21, 1964, and a second deck beneath the existing span was opened in June 1969. The New York City government began a $1.5 billion reconstruction of the bridge's two decks in 2014. The Verrazzano-Narrows Bridge has a central span of . It was the longest suspension bridge in the world from 1964 until it was surpassed by the Humber Bridge in the United Kingdom in 1981. The bridge has the 13th longest main span in the world, as well
Suspension bridge whereas wire strand cables can be formulated one by one in mid-air from a temporary walkway. Most suspension bridges have open truss structures to support the roadbed, particularly owing to the unfavorable effects of using plate girders, discovered from the Tacoma Narrows Bridge (1940) bridge collapse. In the 1960s, developments in bridge aerodynamics allowed the re-introduction of plate structures as shallow box girders, first seen on the Severn bridge built 1961-6. In the picture of the Yichang Bridge, note the very sharp entry edge and sloping undergirders in the suspension bridge shown. This enables this type of construction to be