Analysis of Signalized Roundabouts with Intelligent Transportation Systems - The Case of Gaziantep Junction 40 (Shell)

This study presents an analysis aimed at optimizing traffic flow at the Shell Intersection in Gaziantep. Due to increasing population and vehicle numbers, traffic problems in the city are growing, especially at central intersections. Using PTV-Vissim micro-simulation software, the current situation was analyzed and alternative scenarios were developed. Performance analyses were conducted on models created using field observations and peak hour traffic counts. The intersection, currently at service level "F", is targeted to be elevated to service levels "B" and "C" through the proposed Single Point intersection design and optimized signal plans. Results indicate that the proposed changes could reduce average vehicle delay by 85-93% and increase average speed by 195-239%. This study aims to contribute to the improvement of urban traffic management through the integration of intelligent transportation systems and geometric arrangements.