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Evaluation Approaches of Urban Freeway Greening

Urban freeway greening can beautify the environment, and provide other functions such as anti-glare capability in median area, visual line guidance, accident protection, and environmental ecologic protection. However, the traditional greening evaluation limits to the appraisal of landscape. Therefore, this paper attempts to establish a scientific and reasonable evaluation indexes system of urban freeway greening. On the basis of analysis and summary, this article puts forward the appraisal principles and methods of urban freeway greening. Taking the road section as the appraisal unit and choosing 8 indicators as primary indicators, the paper develops the framework of the evaluation system for urban freeway greening, by using methods of the expert appraisal and principle component analysis. . To a certain extent, this evaluation approaches can scientifically, objectively measure and evaluate the current status and developing level of ecological greening of urban freeway in a certain area.