Western Cross Harbour Tunnel

The Western Harbour Crossing is an underwater tunnel in Hong Kong. It is the third tunnel to cross Victoria Harbour, linking the newly reclaimed land in West Kowloon with Sai Ying Pun on Hong Kong Island.

The Western Harbour Crossing is part of the Airport Core Programme which was a comprehensive set of infrastructure projects associated with the new airport at Chek Lap Kok. The tunnel carries on the Route 3 designation from the West Kowloon Highway, and connects to Route 4 on Hong Kong Island.