Provincial Highway No. 2 (台2線) is an east-west, 166.6 km

Kilometre

The kilometre is a unit of length in the metric system, equal to one thousand metres and is therefore exactly equal to the distance travelled by light in free space in of a second...

-long provincial

Province

A province is a territorial unit, almost always an administrative division, within a country or state.-Etymology:The English word "province" is attested since about 1330 and derives from the 13th-century Old French "province," which itself comes from the Latin word "provincia," which referred to...

 Taiwanese highway

Highway System in Taiwan

Highways in the Republic of China are classified into four types:# National highways: 1 - 10 # Provincial highways: 1 - 39, 61 - 88 # County routes: 101 - 205# Township routes-The numbering system:...

 that starts from the border of Taipei

Taipei

Taipei City is the capital of the Republic of China and the central city of the largest metropolitan area of Taiwan. Situated at the northern tip of the island, Taipei is located on the Tamsui River, and is about 25 km southwest of Keelung, its port on the Pacific Ocean...

 and Tamsui and ends in Suao, Yilan. Although designed as an east-west route, the highway actually goes in north-south direction in Yilan County and parts of New Taipei City. The highway serves as the primary road for the north coast cities in Taiwan.

Major cities and districts along the route

• Tamsui District (Terminus)
• Jinshan District
  Jinshan Township
  -People's Republic of China:*Jinshan Township, Gangu County, Gansu*Jinshan Township, Huma County, Heilongjiang*Jinshan Township, Wuwei, in Liangzhou District, Wuwei, Gansu*Jinshan Township, Lishu County, Jilin*Jinshan Township, Lantian County, Shaanxi...
  
  
• Keelung City
• Ruifang District
• Suao, Yilan (Terminus)

Spur routes

• Highway 2A (台2甲): Also known as Yangjin Highway (陽金公路) for most part, the road connects downtown Taipei
  Taipei
  Taipei City is the capital of the Republic of China and the central city of the largest metropolitan area of Taiwan. Situated at the northern tip of the island, Taipei is located on the Tamsui River, and is about 25 km southwest of Keelung, its port on the Pacific Ocean...
  
   to Jinshan District
  Jinshan District
  Jinshan District of Shanghai is neighbouring Zhejiang and near Hangzhou Bay. It has a land area of 586.14 km² and a population 536,900 as of 2001....
  
  , via Yangmingshan National Park located in north Taipei. The total length is 37.3 km.
• Highway 2B (台2乙): This route is the old Highway 2 segment that continues on to Taipei
  Taipei
  Taipei City is the capital of the Republic of China and the central city of the largest metropolitan area of Taiwan. Situated at the northern tip of the island, Taipei is located on the Tamsui River, and is about 25 km southwest of Keelung, its port on the Pacific Ocean...
  
  . The route starts from downtown Taipei
  Taipei
  Taipei City is the capital of the Republic of China and the central city of the largest metropolitan area of Taiwan. Situated at the northern tip of the island, Taipei is located on the Tamsui River, and is about 25 km southwest of Keelung, its port on the Pacific Ocean...
  
   and ends in Tamsui. The total length is 25.7 km.
• Highway 2C (台2丙): This route is only partially completed; when the route is completed it will go from Keelung
  Keelung
  Keelung City is a major port city situated in the northeastern part of Taiwan. It borders New Taipei and forms the Taipei–Keelung metropolitan area, along with the Taipei and New Taipei. Nicknamed the Rainy Port for its frequent rain and maritime role, the city is Taiwan's second largest seaport...
  
   to Gongliao, connecting the mountain towns in northeast New Taipei City. The total length is 29.6 km.
• Highway 2D (台2丁): This route connects National Highway No. 1
  National Highway No. 1 (Taiwan)
  National Highway No. 1 is the first freeway in Taiwan. It begins in Keelung City at the intersection of Ziao 2nd Road and Jhong 4th Road and ends in Kaohsiung City at the intersection of Jhongshan 4th Road and Yugang Road, giving it a total length of 372.8 km...
  
   and Highway 2, bypassing downtown Keelung. The total length is 13.2 km.
• Highway 2E (台2戊): This route is the old Highway 2 segment in Yilan County, and goes from Wujie to Suao. The total length is 12.1 km.
• Highway 2F (台2己): This route connects Port of Keelung
  Port of Keelung
  The Port of Keelung , also refers to Keelung Harbor, located in the vicinity of Keelung City, Taiwan. It is operated by the Keelung Harbor Bureau, Ministry of Transportation and Communications of The Republic of China.- History :...
  
   and National Highway No. 3
  National Highway No. 3 (Taiwan)
  National Highway No. 3 is the second North-South freeway in Taiwan. It begins in Keelung City at Jijin Interchange on the Provincial Highway No. 2 and ends in Linbian, Pingtung on the Provincial Highway No. 17....
  
   and is used as an alternate route for trucks. The total length is 4 km.
• Highway 2G (台2庚): Thie route connects National Highway No.5
  National Highway No. 5 (Taiwan)
  National Highway No. 5 is a freeway, which begins in Taipei City at Nangang JCT. on National Highway No. 3 and ends in Su-ao, Yilan on Masai Road...
  
  , Highway 9 and Highway 2 in Yilan County. The total length is 3.7 km.