G3 Beijing–Taipei Expressway

Beijing–Taipei Expressway
北京－台北高速公路
Jingtai Expressway 京台高速公路
The current Beijing–Taipei Expressway highlighted in red. The green, unconstructed section across the Taiwan Strait is under planning and controversial.
Route information
Length:	1,872 km (1,163 mi) 2,030 km (1,261.38 mi) Length when complete (hypothetical).
Major junctions
North end:	Liujiayao Bridge, 3rd Ring Road, Beijing
South end:	G99 in New Taipei, Taiwan (unbuilt and hypothetical) G15 in Minhou County, Fuzhou, Fujian (current)
Highway system
Expressways National Highways Transport in China ← G0211 G3W →

北京－台北高速公路

The Beijing–Taipei Expressway (Chinese: 北京–台北高速公路; pinyin: Běijīng–Táiběi Gāosù Gōnglù), commonly known as the Jingtai Expressway (Chinese: 京台高速公路; pinyin: Jīngtái Gāosù Gōnglù), is a partially completed Chinese expressway that, if fully constructed, would connect the Mainland China with Taiwan. Currently, the expressway is complete from Beijing to Fuzhou, Fujian, and is fully complete in Mainland China except for a small section in Fujian which is under construction.

In Taiwan, the expressway is proposed to connect with a hypothetical G99 Taiwan Ring Expressway in New Taipei City, which would supposedly encircle the island of Taiwan, as proposed by the People's Republic of China.

The project has been the source of some controversy because of Taiwan's political status. The People's Republic of China claims Taiwan, but does not currently administer it, so therefore does not have any control of its highways. As Taiwan does not recognize the highway designation by the People's Republic of China and has its own highway system, the Taiwan portion of the expressway has not been constructed. Aside from politics, the other challenge is the engineering difficulties in constructing the link through the Taiwan Strait. A bridge seems less likely than an undersea tunnel, which would have to exceed 100 kilometres in length. This is further complicated given the climatic and weather conditions across the straits.