Which is the longest bridge in the world?

The longest bridge on Earth is the Danyang–Kunshan Grand Bridge in eastern China, which stretches about 164.8 kilometres. It is a railway viaduct that carries the Beijing–Shanghai High-Speed Railway across rice paddies, rivers, lakes and canals, and it opened in 2011. Building the line on a raised viaduct saved farmland and reduced the need for level crossings. For the longest bridge continuously over water, many sources point to the Lake Pontchartrain Causeway in Louisiana, which runs about 38 kilometres. China also opened the Hong Kong–Zhuhai–Macau link in 2018, a 55 km crossing that combines bridges, artificial islands and an undersea tunnel.