The lighting project of the world's longest cross-sea road-rail bridge is being tested in Fuzhou, East China's Fujian province. With a staggering span of 16.34 km, Pingtan Strait Road-rail Bridge is expected to open to traffic in 2020. The bridge has a six-lane highway on the top and a high-speed railway at the bottom, which is designed to support bullet trains traveling as fast as 200 km per hour.