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Fig. 1 | SpringerPlus

Fig. 1

From: Exploring background risk factors for fatigue crashes involving truck drivers on regional roadway networks: a case control study in Jiangxi and Shaanxi, China

Fig. 1

Geographical distribution of expressways in JiangXi (A) and Shaanxi (B), China. Note: Jiangxi, also called “Gan” for short, is located in the southeastern part of Mainland China, on the southern bank of the Yangtze River, covering a total area of 166,900 sq km with a population of about 45.42 million by the end of 2014. Now, it has a total provincial road network of 155,515 km, divided in five administrative levels: 4515 km of expressway (b), 1902 km of a first-class highway, 9941 km of a second-class highway, 10,619 km of a third-class highway, and an additional 101,315 km of a fourth-class highway. As one of the cradles of Chinese civilization, Shaanxi is located along the middle reaches of the Yellow River and a gateway to northwest China. It has an area of 205,600 sq km and its total population reaches 37.75 million by end of 2014. Nowadays, the registered motor vehicles in Shaanxi amounted to more than 6.96 million, and the total highway network exceeds 167,000 km, which includes 4512 km of expressway (c), 1235 km of first class highway, 9268 km of second class highway, 18,164 km of third class highway, and 120,445 km of fourth class highway

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