前言为了定量地掌握道路修建效果,用交通经济学的观点对费用和效益进行测算是很有必要的。而且还得有统一的判断标准来比较各种设计的有效性和必要性。为解答上述问题,需要用修建效果测算手册为手段。这样,就有可能在一定程度上提出较客观且有效的交通政策,或者建立起为决策所需的基 Preface In order to quantitatively grasp the effect of road construction, it is necessary to measure the cost and benefit from the perspective of traffic economics. But also have a unified judgment criteria to compare the effectiveness and necessity of various designs. In order to answer the above questions, it is necessary to use the manual for measuring the effectiveness of construction. In this way, it is possible to propose more objective and effective transport policies to a certain extent or to establish the basis for decision-making