Reliability Modelling on Drivers’ Decision during the Yellow Phase of a Signal Intersection

During the yellow phase starts of a traffic signal, the drivers are unable to take quick decisions whether to stop or cross the signal-controlled intersection. This dilemma zone (DZ) can cause a mix-up among drivers during the yellow phase and may lead to accidents. In the present study we use a DZ prediction model for analysis. In this study, approach speed, acceleration/ deceleration of different vehicle categories, distance to stop line, offset of yellow time, and presence or absence of countdown timer are considered as the main factors influencing the model. In order to address several drawbacks associated with traditional regressionbased models, a kriging-based surrogate model has been developed to explore the drivers’ behaviour during the yellow phase.