The Western Harbour Crossing (WHC) is a dual three-lane immersed tube tunnel in Hong Kong.

It is the third road tunnel to cross Victoria Harbour, linking reclaimed land in Yau Ma Tei in West Kowloon with Sai Ying Pun on Hong Kong Island.

[1]: 7–11 The Government announced in 1990 that the tunnel project would be financed as a private venture, with bidding initially scheduled to be called in April 1991.

[1]: 39–45  In September 1991, the British and Chinese governments signed the Memorandum of Understanding committing their firm support for building the new airport at Chek Lap Kok and its connecting infrastructure.

However, one week before the closing date for tenders, Cross Harbour Tunnel Company and CITIC decided to merge their bids.

Cross Harbour Tunnel Company, with Wharf Holdings as its major shareholder, dissolved its own consortium in favour of joining with CITIC group; the contractors of the CHT team were dropped.

The franchisee traffic forecast in January 1997 made before the tunnel opened was between 50,000 and 70,000 vehicle trips daily during the first year of operation.

[1]: 28–38 Legislators, principally from the pan-democrat camp but including the Liberal Party, criticised the mechanism as being too generous in favour of the franchisee and were unwilling to approve the deal.

The government feared that revision at LegCo would adversely impact project viability and force re-opening of negotiations with the consortium.

[5] However the consultant hired by the Government to find a solution to the traffic problem did not suggest the Western Harbour Crossing have lower tolls.

The consultants said that lowering tolls would result in a very high increase in traffic volume, with severe congestion on the exit to Route 4 during rush hour.

[6] After the 30 year franchise expired in August 2023, the Government, as the new owners of the tunnel, reduced the prices for private cars and taxi.

In the past few years, Lin Cheung Road and slip of West Kowloon Highway were closed to facilitate the races.