Discovery Bay Tunnel, Tunnel in Islands District, Hong Kong, China

Discovery Bay Tunnel is a toll tunnel that runs through Yi Pak Au, linking Discovery Bay Road to Cheung Tung Road near Siu Ho Wan. It is a single-tube tunnel with two lanes separated by a barrier, and it is the only privately managed road tunnel in Hong Kong.

The tunnel was gazetted for construction in September 1997 and opened in May 2000. It was built to serve the growing residential development on the north-eastern coast of Lantau Island.

The tunnel is a key link for residents of Discovery Bay, a community designed to be car-free. Most people who live there rely on resident coaches and the tunnel for their daily commute, giving it a role in local life that few tunnels have.

Access is limited to approved vehicles, so private cars need a special permit arranged in advance. The tunnel operates around the clock, but private vehicles with permits can only pass between 09:00 and 18:00.

Despite its short length, the tunnel has the highest toll per kilometre of any tunnel in Hong Kong. Its traffic volume is also among the lowest, with only about 1,000 vehicles using it each day.