the kap shui mun bridge (ksmb) in hong kong is one of the longest cable-stayed bridges in the world that transports both road and railway traffic, with the upper deck used for motor vehicles and the lower deck used for both vehicles and the mtr. it has a main span of and an overall length of . it spans the kap shui mun marine channel between ma wan and lantau and has a vertical clearance of above sea level. the bridge was completed in 1997.