Cross-Harbour Tunnel

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Cross-Harbour Tunnel

Entrance to the tunnel in Hung Hom, Kowloon in September 2012
Overview
Location	Beneath Victoria Harbour, between Hung Hom Bay and Kellet Island
Coordinates	22°17′29″N 114°10′56″E / 22.29139°N 114.18222°E / 22.29139; 114.18222 (Cross-Harbour Tunnel)
Status	Active
System	Part of Route 1
Start	Hung Hom Bay, Kowloon (between Hong Chong Road and Salisbury Road)
End	Kellet Island, Causeway Bay, Hong Kong Island (Canal Road Flyover)
Operation
Opened	2 August 1972; 52 years ago (1972-08-02)
Owner	Hong Kong Government
Operator	Chun Wo Tunnel Management Limited
Traffic	Vehicular
Vehicles per day	116,754
Technical
Length	1.86 kilometres (1.16 mi)
No. of lanes	4 lanes (2 lanes per direction) in road tunnel with 3 lanes per direction on exit
Operating speed	70 kilometres per hour (43 mph) (within tunnel) 50 kilometres per hour (31 mph) (exit and entrance to tunnel)

The Cross-Harbour Tunnel (abbreviated CHT or XHT) is the first tunnel in Hong Kong built underwater. It consists of two steel road tunnels each with two lanes constructed using the single shell immersed tube method.^[1]

It is the earliest of three vehicular harbour crossings in Hong Kong, opened for traffic in 1972. It was constructed under a 30-year private-sector franchise based on a build–operate–transfer model, and the title passed to the Hong Kong government in 1999 upon termination of the franchise. It has become one of the most congested roads in Hong Kong and the world, with 116,753 vehicles passing through it daily in 2013.^[2]