参考国际上较为通行的分类标准，将城市轨道交通分为地铁、轻轨和有轨电车三大类，对世界城轨交通运营现状进行统计。分析表明：截至2020年底，全球有77个国家和地区的538座城市开通了城市轨道交通系统，总里程超过33?346 km，其中地铁、轻轨、有轨电车各占53%、5%和42%。截至2020年12月31日，我国内地累计有45座城市开通运营轨道交通，运营里程达7?978.19km。2019年，全球地铁和轻轨累计运送乘客超707亿人次，平均负荷强度1.03万人次/(d·km)，其中中国(含港澳台)城轨交通客流超过264亿人次。中国城市轨道交通持续稳步发展，线网规模和客流规模继续居全球第一，以有轨电车为代表的多制式轨道交通得到一定程度的发展，但仍有较大的发展空间。对国内外的有轨电车发展经验进行介绍，以期助力中国有轨电车行业的发展与交通强国的建设。

The article summarizes the statistics for 2020 on operation of urban rail transit systems in the world, which are classified into metro, light rail and tram systems in line with the widely accepted international standards. The statistics show that 538 cities in 77 countries or regions worldwide have hosted urban transit systems by the end of 2020, with the total length reaching 33,346 kilometers, among which, the metro system accounts for 53%, the light rail 5% and the tram 42%. The ridership of metro and light rail worldwide totals 70.7 billion trips in 2019, with an average of 10,300 trips per day. Urban rail transit systems have been built and put into operation in 45 Chinese cities and the total length in operation has reached 7,978.19 kilometers by the end of 2020. It is found that China ranks the first in the world in terms of the size and ridership of its urban rail transit system networks.

U231

国家重点研发计划（YFB1201402）