Optimization of the Signalized Intersection on Emi Saelan Road - Basuki Rahmat Road Using Vissim Software

The Emi Saelan – Basuki Rahmat intersection is a signalized junction connecting a national road and a provincial road in the city of Palu. This intersection experiences a high level of traffic conflict due to the surrounding land use, which includes commercial areas, schools, hotels, restaurants, and access to Mutiara Sis Aljufri Airport. These activities contribute to high traffic volumes, leading to congestion and traffic disorder. This study aims to analyze the intersection's performance using PTV VISSIM software, with evaluation parameters including queue length, delay, and level of service (LOS). Simulation results under existing conditions indicate that all approaches operate at LOS F (delay > 80 seconds), with the longest queue reaching 189 meters and the highest delay recorded at 93 seconds on the south approach. Optimization efforts were carried out by adjusting the green time based on the total cycle time recommended in the 2023 Indonesian Highway Capacity Guidelines (PKJI 2023). The optimization results showed an improvement in the level of service on the north, east, and west approaches to LOS E (delay > 55–80 seconds), along with reduced queue lengths and delays compared to existing conditions.