随着我国经济的飞速发展和城市建设的现代化,越来越多的城市,特别是一些大城市、特大城市的中心城区,出现了诸如交通拥挤、生活质量下降、环境品质恶化等一系列“城市病”。而地铁具有输送能力大、快速准时、全天候、节省能源和土地、污染少等特点,这恰恰可以改善这 With the rapid economic development in our country and the modernization of urban construction, more and more cities, especially in metropolitan areas and megacities, have experienced a series of problems such as traffic congestion, declining quality of life and deterioration of environmental quality. City sickness ". The subway has the ability to transport large, fast on time, all-weather, energy and land savings, less pollution, which can just improve this