基于Entropy-Topsis模型的国省干线公路Y型交叉口安全评价

Safety Evaluation and Improvement Strategy for Y-type Intersection of Main Highway in National and Provincial based on Entropy-Topsis Model

选取交叉口几何特征、交通冲突、交通参与者、交通管理4个层面的评价指标,运用Entropy模型的熵权值法确定各评价指标的权重,再采用Topsis模型建立国省干线公路Y型交叉口综合评价体系。对宁夏石嘴山市国省干线公路4处典型的Y型无信号交叉口进行实证分析,发现运用Entropy-Topsis模型得到的评价结果与实际交通事故数据反映的安全状况相吻合。

Based on the evaluation indexes of intersection geometry, traffic conflict, traffic participants and traffic management, the weight of each evaluation index is determined by Entropy method, and the comprehensive evaluation of Y-type intersection of national and provincial trunk highway is carried out by Topsis model. The four typical Y-type unsignalized intersections on Shizuishan trunk highway in Ningxia are analyzed. The results of Entropy-Topsis model are consistent with the actual traffic accident data. Therefore, the Entropy-Topsis model can provide effective decision-making guidance for the safety evaluation of Y-type intersections on national and provincial trunk lines.