高德地图发布的《2015年度中国主要城市交通分析报告》指出,中国城市交通拥堵呈现两大趋势:一方面,一、二线城市及省会城市是交通拥堵的重灾区,并不断向着小城市蔓延;另一方面,城市交通拥堵程度与经济发达和人口密度呈正相关,京津冀、长三角、珠三角等经济发达地区交通拥堵最为严重。城市交通拥堵问题的根本原因是城市交通与经济社会发展不协调,城市交通供需关系 The 2015 China Major City Traffic Analysis Report issued by Gold Map indicates that there are two major trends in traffic congestion in China’s cities: on the one hand, the first- and second-tier cities and provincial capital cities are the hardest hit by traffic jams and continue to spread toward smaller cities; On the other hand, the degree of urban traffic congestion is positively correlated with the economic development and population density. The traffic congestion in the economically developed areas such as Beijing, Tianjin, the Yangtze River Delta and the Pearl River Delta is the most serious. The root cause of urban traffic congestion is the uncoordinated development of urban transport and economic and social development and the relationship between supply and demand of urban transport