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天津市作为我国四大直辖市之一,拥有1 000万以上的人口,近几年随着城市的发展,人口和机动车保有量均有了迅猛的发展态势,这就加剧了交通需求与道路交通设施增长缓慢之间的矛盾。市民出行仍以自行车为主,主要道路机非混行现象严重,公交平均运营速度仅为18．5 km／h,原有的仅7．4 km的地铁线路根本不能满足大流量的交通需求,更谈不上发挥轨道交通的作用,和北京上海等大城市相比,天津的轨道交通建
As one of the four major municipalities directly under the Central Government in our country, Tianjin has a population of 10 million or more. In recent years, with the development of the city, population and motor vehicle possession have enjoyed rapid growth. This has exacerbated the traffic demand and road traffic The contradiction between the slow growth of facilities. Citizens still travel mainly on bicycles. The main roads are non-intermixed. The average speed of public transport is only 18.5 km / h. The original metro line with a mere 7.4 km can not meet the traffic demand of large traffic at all. Let alone to play the role of rail transit, and Beijing and Shanghai and other cities compared to Tianjin Rail Transit Construction