Analysis of traffic density onthree-way junction in Jalan Sukabangun 2 using Vissim simulations model

Agusri, Erny; Arfan, Muhammad; Arfan, Muhammad · 2021 · Crossref

DOI: 10.14419/ijet.v10i2.31573

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Summary

This study addresses the issue of traffic congestion at a three-way junction in Palembang, Indonesia, specifically the intersection of Jalan Sukabangun 2, Jalan R.A. Abusamah, and Jalan Beringin-Sukabangun 2. The research aims to evaluate current traffic performance and identify effective optimization strategies to reduce congestion, delays, and queue lengths. The motivation stems from the junction’s role as a primary access point for various destinations, leading to significant operational inefficiencies. The authors utilize PTV Vissim 2020, a microscopic traffic simulation software, to model and compare the existing conditions against three proposed intervention methods. The methodology involved comprehensive field data collection conducted in January 2021. Surveys included geometric dimensions of the junction, vehicle volume counts, vehicle speeds, and queue lengths. Data was gathered over one working day and one off-day during peak hours (08:00–09:00, 11:00–12:00, and 16:00–17:00). Vehicle speeds were measured using GPS speedometers, while queue lengths were tracked using travel distance software. The collected data was input into the Vissim model, which was then calibrated and validated. Calibration involved adjusting driver behavior parameters, such as average standstill distance and lateral driving distance, using a trial-and-error approach. The model’s validity was confirmed using the Geoffrey E. Havers (GEH) test, with all resulting values below the threshold of 5, indicating a strong match between simulated and observed traffic volumes. The study simulated three specific optimization variations: the installation of traffic lights, the prohibition of right turns from the east approach (Jl. Beringin-Sukabangun 2), and the division of roads with turning signs. The results demonstrated significant differences in performance metrics. The traffic light method resulted in the highest negative impact, with a queue length of 79 meters and a vehicle delay of 98.954 seconds, worsening the existing condition of a 63-meter queue. In contrast, the method prohibiting right turns from the east approach yielded the best performance, reducing the queue length to 0.287 meters and vehicle delay to 13.307 seconds. The third method, involving road division and turning signs, also improved conditions, resulting in a queue length of 1.147 meters and a delay of 30.169 seconds. The significance of this research lies in its demonstration that specific geometric and regulatory interventions can drastically improve junction efficiency compared to signalization in this context. The findings conclude that prohibiting right turns from the eastern approach and dividing roads with turning signs are the most effective strategies for this specific junction. The study highlights the utility of microscopic simulation tools like Vissim in evaluating traffic management solutions before implementation, providing a data-driven approach to urban traffic planning. By validating the simulation model against real-world data, the authors establish a reliable framework for assessing traffic performance and optimizing junction design in heterogeneous traffic environments.

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• traffic density