Provincial Highway No. 61 is usually known as West Coast Expressway (西部濱海快速公路). There are several sections open for the traffic. Others are still under construction.

Length

As of December 2008, the following sections have been completed:

• Bali, New Taipei - Guanyin, Taoyuan
  Guanyin, Taoyuan
  Guanyin is a rural, coastal township in western Taoyuan County, Taiwan. Guanyin is also the name of a god in Taoism in Taiwan.-Overview:* Area: 87.98 km²* Population: 60,909 people...
  
  : 36 km
• Fengbi Tunnel - Fengshan River Bridge (Xinfeng, Hsinchu
  Xinfeng, Hsinchu
  Xinfeng is a town in Hsinchu County in northern Taiwan. It had an estimated population of 51,664 as of 2007.Xinfeng is a major industrial and manufacturing center in Hsinchu. It shares the Hsinchu Industrial Park with its neighboring town, Hukou. It is also the home of Ming Hsin University....
  
   - Zhubei, Hsinchu): 5 km
• Jinshui Bridge (in Xiangshan, Hsinchu) - Baishatun (in Tongxiao, Miaoli): 37 km
• Tongxiao Bay (in Tongxiao, Miaoli) - Yuanlin Drainage Channel (in Fuxing, Changhua): 61 km
• West Coast Bridge (in Dachang, Changhua) - Houanliao (in Mailiao, Yunlin
  Mailiao, Yunlin
  Mailiao is a township in northwestern Yunlin County, Taiwan. With a population of 33,210, Mailiao has an area of 80.1668 km2.The township's chief industry is the Formosa Mailiao Refinery, an oil refinery that processes of crude oil per day; the refinery exports it goods via the township's...
  
  )
• Huzinei (in Mailiao, Yunlin
  Mailiao, Yunlin
  Mailiao is a township in northwestern Yunlin County, Taiwan. With a population of 33,210, Mailiao has an area of 80.1668 km2.The township's chief industry is the Formosa Mailiao Refinery, an oil refinery that processes of crude oil per day; the refinery exports it goods via the township's...
  
  ) - Budai North (in Budai, Chiayi
  Budai, Chiayi
  Budai is an urban township in Chiayi County, Taiwan. Its industry is mainly made up of fishery. It was the site where Japanese forces landed and completed the encirclement of Tainan during the Japanese Invasion of Taiwan in 1895....
  
  ): 46 km
• Budai, Chiayi
  Budai, Chiayi
  Budai is an urban township in Chiayi County, Taiwan. Its industry is mainly made up of fishery. It was the site where Japanese forces landed and completed the encirclement of Tainan during the Japanese Invasion of Taiwan in 1895....
  
   - Qigu, Tainan: 26 km

Intersections with other Freeways and Expressways

• Provincial Highway No. 66
  Provincial Highway No. 66 (Taiwan)
  Provincial Highway No. 66 is an expressway, which begins in Guanyin, Taoyuan on the Provincial Highway No. 15 and ends in Daxi, Taoyuan on the County Highway No. 112A.-Major Cities Along the Route:*Yangmei, Taoyuan*Pingzhen City*Zhongli City*Daxi, Taoyuan...
  
   at Guanyin IC. in Guanyin, Taoyuan
  Guanyin, Taoyuan
  Guanyin is a rural, coastal township in western Taoyuan County, Taiwan. Guanyin is also the name of a god in Taoism in Taiwan.-Overview:* Area: 87.98 km²* Population: 60,909 people...
  
  
• 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....
  
   at Westcoast IC. in Zhunan, Miaoli
• Provincial Highway No. 78
  Provincial Highway No. 78 (Taiwan)
  Provincial Highway No. 78 begins in Taixi, Yunlin, Taiwan, on Zhonghua Road and ends in Gukeng, Yunlin on National Highway No. 3.-Intersections with other Freeways and Expressways:...
  
   at Taixi IC. in Taixi, Yunlin
• Provincial Highway No. 84
  Provincial Highway No. 84 (Taiwan)
  Provincial Highway No. 84 is an expressway, which begins in Guantian, Tainan on the Provincial Highway No. 1 and ends in Yujing, Tainan on Jhongshan Road .-Intersections with other Freeways and Expressways:...
  
   at Beimen IC. in Beimen, Tainan
  Beimen, Tainan
  Beimen District is a rural district of about 12,551 residents in Tainan, Taiwan....
  
  

Branch Line

Provincial Highway No. 61A (Taipei Port - Bali, New Taipei) is the only branch line of Provincial Highway No. 61. It starts at Taipei Port and ends at Bali, New Taipei, which connects Taipei Port and Provincial Highway No. 15 and No. 61. Its length is 2.4 km.

Note

The first portion of the expressway was between Xiangshan, Hsinchu and Baishantun. It was used to connect the northern section 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....

at Xiangshan IC.