Study on Conflict Probability Model between Motor Vehicles and Pedestrians at Intersections

In order to quantify the traffic conflict between motor vehicles and pedestrians at urban intersections,conditions under which traffic conflict may occur are presented at first,then three critical parameters which influenced traffic conflict probability are selected including distribution law of motor traffic headways,critical gap of pedestrians crossing motor vehicles and occupying duration of pedestrians,afterwards the function relation between amount and occupying duration of pedestrians is constructed with photogrammetry and the critical gap with occupying duration of a certain amount of pedestrians is compared,finally the condition that several rows of pedestrians occupied conflict zone is analyzed and the conflict probability model between difference configurations of pedestrians and motor vehicles is developed.The values of conflict probability is calculated through an actual example.The results indicate that the conflict probability increases with the volume of pedestrians growing,which accords with traffic actual working condition.