加权主成分分析法在可变限速系统综合评价中的应用

以可变限速系统(VSL)项目为研究对象,运用加权主成分分析法设计了VSL项目社会经济影响综合评价模型,并通过基于交通仿真软件模拟设计的评价方案给出了评价案例.评价结果表明,利用加权主成分分析法评价VSL项目可以将主成分分析法的客观分析和层次分析法的主观分析有机地相结合,有效地评判出不同交通流量下的最佳限速控制值,其评价结果更加全面、更加符合客观实际情况.

Application of Weighted Principal Component Analysis in Comprehensive Evaluation for Variable Speed Limits

By making a study on Variable Speed Limits(VSL) projects, this paper presents a comprehensive Weighted Principal Component Analysis(WPCA) model for the socio-economic impact evaluation of VSL projects and an example is introduced based on simulated program. The evaluation results show that WPCA model can combine organically the objectivity of principal component analysis with the subjectivity of Analytic Hierarchy Process and can judge effectively the optimal speed-limiting value under the different volume of traffic, so the evaluation results should be more overall.