Optimizing the Performance of Signalized Intersection Using Synchro Simulation Software

Traffic congestion has emerged as a crucial issue in urban cities, especially at signalized intersections, causing long queues, longer travel times and environmental problems. The effectiveness of the road system is heavily dependent on the performance of signalized intersections. This research focuses on the Al-Salmani signalized intersection in Benghazi as a case study to highlight the delay and level of service (LOS) issues prevalent in Benghazi intersections. The intersection holds considerable importance within the traffic system of Benghazi due to its strategic location at the eastern entrance, adjacent to the city center. The aim of this paper is to optimize traffic operations in the Al-Salmani signalized intersection by examining three proposed scenarios including modifications in cycle length, heavy vehicle restriction and additional lane construction. Synchro 11 simulation software is used to evaluate and improve the delay and LOS at the intersection. The result of this study indicates that the intersection is operating under the unsuitable condition with LOS (F). Furthermore, Alternative scenarios 1,2, and 3 show decreases in delay values of 81.25%, 86.41%, and 92.91%. Scenario 2 showed an improvement in LOS, reaching LOS C, and scenario 3 advanced to LOS B.