China's Danyang–Kunshan Grand Bridge: World's Longest at 164.8 km

The Danyang–Kunshan Grand Bridge in China, spanning 164.8 km, holds the Guinness World Record as the longest bridge globally. Built in four years at a cost of billions, it is a rail viaduct on the Beijing–Shanghai high-speed railway, not a road bridge. The record underscores China's infrastructure scale but has limited immediate market impact.