天津市原是全国第二个拥有地铁的城市,但时至今日,它已远远落在北京、上海、广州和深圳之后。天津地铁扩建工程即将开工是一个值得庆贺的大事,这对于改善天津市区的交通状况具有举足轻重的作用。笔者认为,天津地铁扩建应该综合考虑长度和结构两方面因素,先成环、后分叉,这样可以发挥更大效用。 Tianjin was originally the second city in the country to own a subway, but today it has lagged far behind Beijing, Shanghai, Guangzhou and Shenzhen. The upcoming commencement of the expansion project of the Tianjin Metro is a memorable event, which plays a decisive role in improving the traffic conditions in downtown Tianjin. The author believes that the extension of Tianjin Metro should take into account both length and structure factors, the first ring, after the bifurcation, so you can play a more effective.