Kap Shui Mun
The Ma Wan Viaduct has the same cross section as the Tsing Ma and Kap Shui Mun Bridges: a dual three-lane carriageway on the upper deck and two tracks of railway and two lanes of roadway in the enclosed lower deck. The lanes on the lower deck allow for maintenance and the diversion of traffic during high winds. The railway carries the Tung Chung and Airport Express lines of Hong Kong's Mass Transit Railway (MTR).