双车道公路车速标准差与交通冲突相关性研究

The Study of Correlation Between Speed Standard Deviation and Traffic Conflict on Two-lane Highway

为了确定双车道公路车速标准差和交通冲突强度之间的相关性,分析了车速标准差、交通冲突强度与交通事故率之间的关系,理论上建立了车速标准差与交通冲突强度之间的内在联系。通过省道203现场实测数据分析表明双车道公路车速标准差与交通冲突次数之间存在显著的相关关系,多种回归模型分析结果认为多项式回归模型相关系数最高,达到了0.79,研究结果表明双车道公路车速标准差与交通冲突强度存在强相关性。

In order to determine the correlation between speed standard deviation and traffic conflict on two-lane highway,the paper analyzes the relations between speed standard deviation,strength of traffic conflict and traffic accident rate,then,the internal relations were established.The analysis showed that significant correlation between speed standard deviation and strength of traffic conflict on two-lane highway by using field test data of provincial highway 203.The analysis results indicate that the correlation of polynomial regression model is highest up to 0.79 among various regression models.The results show that the high correlation existence between speed standard deviation and strength of traffic conflict.