Humber Bridge single-span suspension bridge for 16 years from its opening in July 1981, until the opening of the Great Belt Bridge in June 1997, and was relegated to third place with the opening of the Akashi Kaikyō Bridge in April 1998. It is now the eighth longest single-span suspension bridge. The central span, at 1410 m (4640 ft), is the UK's longest. It remains the longest single-span suspension bridge in the world that one can cross on foot or by bicycle. The bridge is crossed twice during the annual Humber Bridge half marathon. In July 2013, work began on introducing a
Cameron Suspension Bridge single span with no temporary falsework. When built, the Cameron bridge was the longest suspension span west of the Mississippi River. The bridge towers rest on the rim of the canyon, with concrete deadmen anchoring the suspension cables some way back from the towers. The deck is stiffened by a Pratt through-truss, with a wide roadway. The bridge was built to improve access to the Navajo Nation and the Hopi Indian Reservation. Named for U.S. Senator Ralph H. Cameron, it was an important link for the construction of the Navajo Bridge on US 89 across the Colorado River in 1929.