The Humber Bridge was built between 1972 and 1981. Construction started in 1972 (or 1973 according to some sources) and took eight years to complete. The bridge opened to traffic on June 24, 1981, with the official opening ceremony by Queen Elizabeth II on July 17, 1981. The bridge was a major engineering feat, featuring the longest single-span suspension bridge in the world at the time of its completion.