The Xiamen Bicycle Skyway in China’s Fujian province, completed in 2017, spans 7.6 kilometers and integrates with bus and BRT transit lines. Elevated five meters above the road, it connects residential and business areas. Developed to reduce traffic congestion and promote sustainable transit, the pathway includes multiple access points and facilities for cyclists.

Source:  https://www.dezeen.com/2017/03/05/xiamen-bicycle-skyway-dissingweitling-worlds-longest-elevated-cycling-route-china/