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天津中山门“蝶型”立交桥位于中环线东西两半环相接处。它沿着中环线方向构成两座不同高程的主桥跨越津塘公路,由八个匝道桥与四方沟通。建桥前,这里道路狭窄,每小时要有14934辆次各种车辆通过,算得上是人山车海,造成交通频繁堵塞,给津城人民带来很大不便。为了迅速改变这种状况,在这里建设了一座大型的三层互通式
Tianjin Zhongshan Gate “Butterfly” overpass is located at the middle and east half of the Central Link. It forms two main bridges with different elevations along the Central Link and crosses the Jintang Highway. The eight ramp bridges communicate with the Quartet. Before the bridge was built, the road was narrow, and there were 14,934 vehicles passing every hour. It was considered to be a mountain of people, which caused frequent traffic jams and caused great inconvenience to the people of Jincheng. In order to quickly change this situation, a large three-tiered interchange was built here.