当前,中国正处于地铁建设高速期,全国范围内,数十条地铁线路正在同期建造。目前,全国获批线路共计120条、3400多公里;全国25个城市有在建项目,里程约1500公里;全国有13个城市拥有运营线路,总里程约1540公里。这比国际地铁发达城市的建设速度快很多。以仅有16年运营史的上海为例,已开通运营11条线,里程达420公里,一举赶超 At present, China is in a high-speed subway construction period. Dozens of subway lines are under construction throughout the country. At present, there are 120 approved routes and over 3,400 kilometers of national approved routes. There are 25 cities under construction in the country with mileage of about 1,500 kilometers. There are 13 cities in the country with operation routes with a total mileage of 1,540 kilometers. This is much faster than the construction of international metro developed cities. Taking Shanghai with a history of only 16 years as an example, it has already opened 11 lines of operation with a mileage of 420 km