EVALUATION OF SAFETY PROGRAMS FOR UNSIGNALIZED INTERSECTIONS CONSIDERING THE BEHAVIOR OF LEFT TURNING VEHICLES

Abstract

It is considered that the purpose of stop sign is not only to display the priority at intersection but also to make the vehicles to avoid dangerous behavior. This study discuss how to decrease such dangerous vehicles more effectively by the improvement of intersection.
The relationships between the behavior of vehicles and the variables belonging to intersection, such as sight distance or position of. stopping line, were clarified. Simulation model was built up to calculate the ratio of dangerous vehicles which should wait the passing of right-way vehicle and cannot stop up to the intersection.
Also some alternative safety programs were evaluated by this model for existing intersection.