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第五部份运营车速的确定如前所述,车辆的寿命、轮胎的寿命与运营车速有直接关系。因此,运营车速的大小直接影响着运营成本。世界银行在计算运营车速时采用了两种不同的方法。一种是以美国的路况及观测资料为基础的《公路通行能力手册》所采用的方法,简称为《HCM》法。另一种是以法国资料为基础建立起来的计算方法简称《SETEC》法。两种方法的结构各异,所需
The fifth part of the operating speed determination As mentioned earlier, the life of the vehicle, tire life and operating speed are directly related. Therefore, the size of the operating speed directly affects the operating costs. The World Bank used two different methods in calculating operating speed. One is the “Highway Capacity Manual” based on US road conditions and observations, referred to as “HCM” for short. The other is based on the French data set up the calculation method referred to as “SETEC” method. The two methods vary in structure and need