North Lantau Highway

History

Background

The North Lantau Highway was built as part of the Airport Core Programme in the 1990s. The ultimate aim of the new motorway was to connect Hong Kong's urban core with the new international airport (opened 1998) as well as associated new town development in Tung Chung. Construction commenced in June 1992 to a design by Mott MacDonald Hong Kong.

Construction and opening

Rather than tendering the project as a single contract, which would have drawn bids from only the largest international contractors, the Hong Kong government opted to split the expressway into three separate phases that would be more manageable in scale to local companies, thereby drawing a more competitive range of bids. The contract to construct the Tai Ho Section, worth HK$3.5 billion, was awarded on 8 June 1992 to the Lantau Expressway Joint Venture, of which Downer Group was the lead contractor. The Yam O Section contract, worth $1.328 billion, was awarded on 14 September 1992 to a joint venture comprising Aoki Corporation, Franki Contractors, and Tobishima Corporation. Lastly, the Tung Chung Section contract, worth $969.1 million, was awarded on 27 September 1993 to a joint venture composed of China State, Leighton Asia and Hochtief.

The expressway opened to traffic on 22 May 1997. In the days leading up to the opening, officers of the Agriculture and Fisheries Department rounded up about 30 cattle who had wandered onto the highway during construction, when the perimeter fence was not fully enclosed.

Sunny Bay Interchange

The Sunny Bay Interchange came into operation in 2005, allowing traffic to exit the North Lantau Highway onto the new Penny's Bay Highway. This opened up access to Penny's Bay, which was reclaimed mainly for the new Hong Kong Disneyland.

2008 flooding

On 7 June 2008, North Lantau Highway and its service road, Cheung Tung Road, were completely flooded at Caribbean Coast, Tung Chung at 6am, under rainfall as high as 145 mm per hour. The highway was forced to close completely, rendering Hong Kong International Airport at Chek Lap Kok inaccessible by road. With a water depth of 3 m, and the flood extending 500 m in length, some 20 vehicles were trapped on the scene by the floodwater. Another thousand vehicles were trapped in the resulting traffic jam, extending about 10 km back to the toll plaza of Lantau Link. Service was increased on the MTR Tung Chung line and Airport Express to alleviate passenger flow.

The highway was partially reopened starting from 4:00 pm that day.

Design

An early design for the North Lantau Highway was completed in the early 1980s. It was envisaged as a two-lane dual carriageway "[hugging] the rugged northern coastline of Lantau". However, the plan did not proceed at that time as the airport project was shelved by the government for financial reasons.

The Chek Lap Kok airport project was resurrected in 1989 under the governorship of David Wilson. In the same year, new motorways design standards were introduced in Hong Kong. In 1990, the highway was redesigned to reflect these new standards, and to take into account higher projected usage. The North Lantau Highway, as built, is a three-lane dual carriageway with a gentler grade and curvature than the earlier iteration. Hard shoulders of 3.3 metres are also provided on either side of the expressway.

Most of the highway is built on reclaimed land. The fill for the land reclamation came from slope cuttings or marine borrow areas in Hong Kong, or was river sand imported from China.

The most significant bridge along the length of the road is located at the very end of the highway, linking Lantau and Chek Lap Kok. This multi-span structure, approximately 320 metres long, also carries a utility conduit serving the airport containing electricity, water, sewerage, telephone, and raw water connections. There are smaller bridges at Tai Ho Wan and Sham Shui Kok.

Interchanges

References

1. "North Lantau Expressway". New Airport Projects Co-ordination Office, Government Secretariat.
2. (1998). "Design and construction of the West Kowloon Expressway, Kwai Chung and Tsing yi section of Route 3 and the North Lantau Expressway". Proceedings of the Institution of Civil Engineers.
3. (7 March 1992). "Expressway contract split to help locals". [[South China Morning Post]].
4. "List of Current Contracts as at 31/12/96". New Airport Projects Co-ordination Office, Government Secretariat.
5. (28 October 1993). "Tai Ho route almost finished". South China Morning Post.
6. (22 May 1997). "Drivers' beef with new road". South China Morning Post.
7. (2008-06-08). "百年一遇 暴雨沖潰機場命脈 北大嶼山公路成河道 交通癱瘓10小時". Ming Pao.
8. (2008-06-08). "洪水五秒癱瘓機場公路". Sing Tao Daily.
9. (14 October 1991). "Work on highway split into three". South China Morning Post.
10. (August 2017). "The Annual Traffic Census 2016". Transport Department.
11. (18 January 2018). "N. Lantau Highway traffic up 40% over four years". Lantau News.
12. "Contract No. HY/2012/07 Tuen Mun–Chek Lap Kok Link Southern Connection Viaduct Section". Highways Department.