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我国第一条汽车专用公路——京塘公路,起自北京左安门,经过河北廊坊地区,终点是天津塘沽,全长151.6公里,系专供汽车行驶,其它人、车则以上跨、下穿等方式与其相交或分开。故具有高速、安全、舒适、直达,车辆通过能力大的特点。这条公路的测量设计工作由交通部第一、二公路勘察设计院负责,公路规划设计
China’s first car dedicated road - Jingtang Road, starting from Beijing Zuoanmen, Langfang through the area of Hebei, the end is Tianjin Tanggu, a total length of 151.6 kilometers, designed for cars, other people, the car is more than cross, under Wear and other ways to intersect or separate. Therefore, it has the characteristics of high speed, safety, comfort, direct access and large passing capacity of vehicles. This road measurement and design work by the Ministry of Communications, the first and second Highway Survey and Design Institute is responsible for highway planning and design