the total length of the kap shui mun bridge includes a approach span on the lantau side. there is a column in each of the back spans of the cable stayed bridge, making four spans, adding to the main span. this makes the total length . the ma wan viaduct was constructed under the same contract as the ksmb. the viaduct connects the ksmb to the tsing ma bridge, forming the lantau link, which was built to provide access to the new airport. the navigation clearance of is part of the reason that the h-shaped towers are tall.