Characterizing the Dilemma Zone at Intersections by Introducing the Break Point

Abstract

Abstract The dilemma zone at signalized intersections presents a critical challenge for drivers, often leaving them uncertain about whether to stop or proceed when the yellow light appears, resulting in dangerous red-light running and a heightened risk of traffic accidents. To mitigate this confusion and enhance intersection safety and efficiency, the introduction of break points is proposed. These break points serve as visual cues to guide drivers in initiating the deceleration process when the amber light is activated. This study focuses on evaluating the impact of break points by conducting simulations in PTV Vissim. The goal is to assess the changes in stop delay for intersections with varying traffic volumes and lane configurations. The study involves a comparative analysis of average stop delay in different directions at the intersection before and after the introduction of break points. The results consistently demonstrate a reduction in average stop delay across all directions after the implementation of break points. This reduction indicates a clear enhancement in the overall efficiency of the intersection, with a smoother flow of traffic, reduced congestion, and a decreased risk of abrupt stops and potential accidents. The findings underscore the effectiveness of break points in addressing the dilemma zone challenge, contributing to safer and more efficient intersections in urban and suburban settings.