西區海底隧道
Route 3 () is a series of expressways in Hong Kong that runs from Sai Ying Pun on Hong Kong Island to Yuen Long in the New Territories, linking West Kowloon, Kwai Chung and Tsing Yi. It was built as part of the Airport Core Programme to provide access to Hong Kong International Airport from the city, and to relieve congestion in the New Territories. The Western Harbour Crossing and Tai Lam Tunnel that form part of the route are tollways.