然而，在折限率较低与交通量大的情况下，从本质上讲，与建设的最初成本没有关系。
However, at lower discount rate and heavy traffic flow the initial cost of construction is in essence irrelevant.
混凝土强度、施工进度、车辆畅通是换板施工的三个主要问题，在交通量大的公路上更是如此。
The intensity of concrete, progress of construction and free traffic are three main problems for board updating construction, especially in highway with large traffic volume.
以经济发达、交通量大的上海地区为研究背景，建立相应的数学模型，分析评价高速公路收费的综合效益。
At the background of Sanghai area with prosperous economy and huge traffic, corresponding mathematical model is established to analyze and evaluate the synthetical effect of tolling.
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