Risk Assessment and Expansion Characteristics of Non-motor Vehicle Through Movement at Signalized Intersections
With the increase of non-motor vehicles in urban traffic,the expansion characteristics of non-motor vehicles traveling through the intersection are observed more often.This paper focused on the conflicts of vehicle movements at intersections and proposed an assessment method for the conflict risk of non-motor vehicle through movements considering the expansion characteristics.This study selected four typical urban intersections in Tianjin city of China to collect non-motor vehicle driving behavior data through video analysis software and analyzed the driving behavior characteristics while traveling through under expansion conditions.Using the K-means cluster analysis,the driving area was divided into three zones for the through movement of non-motor vehicle:release area,expansion area,and convergence area.A Signalized Intersection Direct Non-Motorized Vehicle Conflict Risk Evaluation System was developed by using different driving areas of direct non-motor vehicles as primary indicators and driving behavioral characteristics in these areas as secondary indicators.A method for calculating the entropy of non-motorized conflict risk was proposed,utilizing an improved entropy weight method.The results from the case study of Weidi Road in Tianjin city show that the conflict risk is mainly concentrated in the zone where vehicles have frequent overtaking and parallel behavior.The change and distribution of the risk points are consistent with the trend of risk change during the process of vehicle expansion,which can provide certain references for the research of non-motor vehicle conflict risk at signalized intersections.
万方数据
维普
