page_title: China National Highways
section_title: Regulation
hierarchical_section_title: China National Highways / Regulation
caption_attribution_description: 中文: 昌平西关环岛
context_page_description: The China National Highways is a network of trunk roads across mainland China. Although they are called "highways", they are not necessarily freeways. However, like expressways, a toll is sometimes charged.
context_section_description: Although an accepted speed limit on China National Highways is 100 km/h, it is common to see cars pass other by in well in excess of 100 km/h. The lack of speed detection cameras on some routes, lack of a posted speed limit outside of localities and tremendous distances of road mileage, means that enforcing this speed limit is rather herculean. In addition, there is a notable shortage of traffic police in mainland China.
  Nationwide highways often begin with the letter GXXX, followed by three numerals, e.g.: G107. It is said that the GXXX stands for 国家 (guójiā), or national.
  The numbering of the highways is as follows:
  Five vertical and seven horizontal main routes were labelled in the former 000 series (the so-called "five downs and seven acrosses"), although these have been deprecated in favour of the "NTHS" (7, 11, 18) system.
  Highways in the 100 series (e.g. 102, 106) begin from Beijing - the capital city of the People's Republic of China - and spread out in all compass directions, except for China National Highway 112, which originates in Xuanhua as it is a ring around Beijing.
  Highways in the 200 series stretch from north to south (e.g., from Hohhot in Inner Mongolia through to Beihai in Guangxi province);
  Highways in the 300 series stretch from east to west (e.g., from Shanghai through to Ruili in Yunnan province);
  Highways in the 500 series are connecting roads between other national highways.
  In major cities, there is usually a gap in the road within the city.
caption: Roundabout sign on China National Highway 110, Changping District, Beijing
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