Route 6 is a road route number reserved for future use by the Hong Kong Government. It is proposed to run through central Kowloon

Kowloon

Kowloon is an urban area in Hong Kong comprising the Kowloon Peninsula and New Kowloon. It is bordered by the Lei Yue Mun strait in the east, Mei Foo Sun Chuen and Stonecutter's Island in the west, Tate's Cairn and Lion Rock in the north, and Victoria Harbour in the south. It had a population of...

 in Hong Kong

Hong Kong

Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...

 and is marked as a high-priority trunk route in the Third Comprehensive Transport Study.

The current proposed route starts off Route 3

Route 3 (Hong Kong)

Route 3 is a series of expressways in Hong Kong from Sai Ying Pun on the Hong Kong Island to Yuen Long in the New Territories, via Yau Ma Tei, Kwai Chung and Tsing Yi Island.From south to north, Route 3 can be divided into four parts...

 near Yau Ma Tei

Yau Ma Tei

Yau Ma Tei, also known as Waterloo , is an area in the Yau Tsim Mong District in the south of the Kowloon Peninsula in Hong Kong.-Name:Yau Ma Tei is a phonetic transliteration of the name 油麻地 in Cantonese...

, passes through the new Central Kowloon Route and an unnamed submarine tunnel

Tunnel

A tunnel is an underground passageway, completely enclosed except for openings for egress, commonly at each end.A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. Some tunnels are aqueducts to supply water for consumption or for hydroelectric stations or are sewers...

 which together leads to the underground of former Kai Tak Airport

Kai Tak Airport

Kai Tak Airport was the international airport of Hong Kong from 1925 until 1998. It was officially known as the Hong Kong International Airport from 1954 to 6 July 1998, when it was closed and replaced by the new Hong Kong International Airport at Chek Lap Kok, 30 km to the west...

, junctioning Route 5

Route 5 (Hong Kong)

Route 5 is a route artery in Hong Kong from eastern to western Kowloon and New Kowloon, and ends in Tsuen Wan in the New Territories, linking Route 9....

 on the way. Then the route junctions Kwun Tong Bypass

Kwun Tong Bypass

Kwun Tong Bypass is an elevated bypass expressway in Kwun Tong, Kowloon, Hong Kong with three lanes in each direction and a posted speed limit of 70-80 kilometres per hour. It comprises part of Route 2 and has links to Route 5 and Route 7....

 of Route 2

Route 2 (Hong Kong)

Route 2 of Hong Kong runs from Quarry Bay of Hong Kong Island to Ma Liu Shui of the New Territories, formerly known as route 6, and renamed as route 2 in 2004 under the route numbering scheme proposed in the same year....

 in Kowloon Bay

Kowloon Bay

Kowloon Bay is a bay located at the east of the Kowloon Peninsula and north of Hong Kong Island in Hong Kong. It is the eastern portion of Victoria Harbour, between Hung Hom and Lei Yue Mun...

, and runs through an underground tunnel to Lam Tin

Lam Tin

Lam Tin is an area in the Kwun Tong District in southeastern New Kowloon, Hong Kong. Lam Tin is primarily a residential area, though it also hosts a major transport interchange and the location of several renowned shopping attractions. Lam Tin was once a large field in the vicinity of Kowloon Bay....

, where it junctions with Route 2 again at the entrance to Eastern Harbour Crossing

Eastern Harbour Crossing

The Eastern Harbour Crossing, abbreviated as "EHC" , is a tunnel in Hong Kong. It is a combined road and MTR rail link under Victoria Harbour between Quarry Bay in Hong Kong Island and Cha Kwo Ling in Kowloon.- History :...

 and runs into another proposed route, Tseung Kwan O - Lam Tin Tunnel to southern Tseung Kwan O

Tseung Kwan O

Tseung Kwan O is a bay in Sai Kung District, New Territories, Hong Kong. In the northern tip of the bay lies the Tseung Kwan O Village....

.

The route, when completed, is expected to relieve the congestion problem in Kowloon, and will also serve as an alternative route for the existing Tseung Kwan O Tunnel.