Abstract: In recent years freeway green landscape is an important part of the freeway systems to provide landscape scenic view and other functions such as anti-glare capability in median area, soil stability enhancement capability in slope embankment area, and environmental ecologic protection capability in roadside area. In order to have freeway green landscape perform good quality, adequate maintenance should be routinely performed. Thus, field survey activities should be carried out to evaluate the quality of freeway green landscape. But at present domestic and international research in this area still only described, investigated it, and didn’t make regular model evaluate it. Through analyzing the function of greening, the expert’s choice and analyzing principle component,this paper summarized a research project that was to develop evaluation index for freeway green landscapeevaluation, basing on freeway in Jiangsu.

Key words: freeway, greening, evaluation index, principle component analysis

摘要： 近年来，环境绿化在公路建设中越来越受到重视，它不仅能够美化环境，而且具有防眩、防护、生态保护的能力。为了充分分析、评价已建公路的工程绿化状况，对高速公路绿化工程进行分析评价，是非常必要和紧迫的。但目前国内外在这方面的研究还处在仅仅描述、考察的阶段，尚未有固定的模式与方法来评价公路绿化的优劣。为此，本文通过对绿化功能分析、主成分分析和专家筛选的方法，同时结合我国江苏公路绿化的具体情况，提出了高速公路绿化的评价指标体系。

关键词: 高速公路, 绿化, 评价指标体系, 主成分分析