Tuen Mun Road
Tuen Mun Road was one of Hong Kong's first high speed roads, and the first expressway. Its construction proved to be a great challenge for the engineers. The road had to be built along the winding coastline, and the steep terrain encountered required the construction of numerous viaducts, culverts and cuttings. To save construction costs, the road was built with narrow carriageways and substandard geometry, causing frequent traffic accidents and subsequent congestion for a long period, and as a result speed limits reduced to . Another such measure was putting the construction work into phases.