Nam Wan Tunnel under construction in 2006.
Nam Wan Tunnel is a tunnel in Hong Kong opened to traffic on 20 December 2009,[ 1] along with the West Tsing Yi Viaduct , East Tsing Yi Viaduct and Stonecutters Bridge . The road tunnel, which forms an important part of the HK$ 15 billion Route 8 , linking Tsing Yi and Sha Tin in the city, began construction since 2003 and was completed in 2007.
The twin-tube tunnel, built by the Highways Department of the Government of Hong Kong , is 1.2 kilometres (0.75 mi) long and has three lanes in either direction in the southern part of Tsing Yi from Sai Tso Wan to Nam Wan Kok . It provides linkage between the eastern part of the New Territories and Hong Kong International Airport . The tunnel is toll-free.
The twin tunnels are 15 metres (49 ft) wide with 12 cross-passages and emergency walkways, and a portal building at each end. They were formed by blasting through granite and volcanic rocks.