一线城市多成“堵城”已是不争的事实,而中国二三线城市也正在步一线城市后尘快速驶入“拥堵时代”。随着城市扩张及治堵需要,现在愈来愈多城市都有了修建地铁的要求。修建地铁是必然的,是缓解城市压力的一个必然选择,更是解决城市交通问题的最佳方法。 First-tier cities into more “blocking the city ” is an indisputable fact that China’s second and third tier cities are also rapidly moving into the first-tier cities “congestion era ”. With the expansion of the city and the need to stop it, more cities are now required to construct the subway. The construction of the subway is inevitable and an inevitable choice to relieve the pressure on the city. It is also the best way to solve the traffic problem in the city.