Modelagem do tráfego em interseções não semaforizadas de Fortaleza com uso de simulação microscópica

Abstract

The increasingly intensity of problems’ such as congestion and accidents in urban road networks increases the need for knowledge of transport phenomena. The microscopic simulation is a computational tool that can be used to analyze the traffic and which is increasingly important because of its capability to model the behavior of each individual driver. This research aims to propose and implement a methodology for modeling traffic at STOP-controlled intersections using microsimulation tools. To achieve this objective, the main microscopic simulators available to commercial use were subject of study, one of them was chosen, based on established criteria for comparison, to model traffic at an intersection from Fortaleza, a calibration method of gap-acceptance model was developed, and then the model was calibrated and validated based on the unsignalized intersection selected for this. The preliminary study of the microsimulators’ gap-acceptance models was essential for a good understanding of the modeling performed by them and to explain the significant differences in the estimation of both traffic performance measures and the capacity of minor approach obtained. Using the waiting time of the vehicle in the head of minor approach’s queue and the chi-square statistic to calibrate time gap parameter of priority rules gapacceptance model available in VISSIM 6, the values obtained were 3.6s for the crossing movement and 3.9s for the right-turning movement. The model was validated using both the chi-square test and the confidence interval applied to simulated and field data waiting times samples mean’s difference, both with 5% significance level. Despite the small amount of data collected in the field, the results were relatively satisfactory