地铁是地下铁道的简称,狭义上专指在地下运行为主的城市轨道交通系统。但广义上,通常涵盖了都市地区各种地下与地面上的高密度交通运输系统。地铁作为一种公共交通工具,在现代大都市的运营管理中具有举足轻重的作用。目前,我国已有20多个城市开通运营地铁,北京市地铁自1965年7月1日开工建设以来,历经近半多个世纪的发展。2010年北京地铁公司所辖12条线路总客运量首次突破15亿人次,达15.95亿 Subway is the abbreviation of the subway, narrowly refers specifically to the underground operation of the urban rail transit system. But in a broad sense, it usually covers high density transport systems on all types of underground and ground in metropolitan areas. As a kind of public transportation, the subway plays an important role in the operation and management of modern metropolis. At present, more than 20 cities in our country have opened and operated subways. Since the Beijing Subway started construction on July 1, 1965, it has experienced nearly half a century of development. For the first time, the total passenger volume of 12 lines under the jurisdiction of Beijing MTR Corporation exceeded 1.5 billion passengers in 2010, reaching 1.595 billion