Abstract
In this paper, the construction of the pressure-state-response model is referred to build the indicator system for assessing the environmentally sustainable development of the expressway during construction and operation periods. And a specific measurement method is given in this study. The principal component analysis is performed to determine the weight of each index by statistical analysis, and to calculate the environmentally sustainable development indices during the construction period and operation period, and the whole project. According to the results, the environmentally sustainable development indices during construction and operation period are most related with the pressure index, which means that the environmentally sustainable development of the expressway is closely related to the reasonability of the design, construction and operation of the expressway itself.
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