Evaluasi kinerja simpang dan biaya konsumsi bahan bakar pada Simpang Empat Ketandan Ringroad Timur berdasarkan PKJI 2023 dan pemodelan VISSIM

Abstract

The increasing vehicle volume at the Ketandan intersection on Ringroad East Yogyakarta has resulted in deteriorating traffic performance and higher fuel consumption due to excessive delays. Garuda Road, which provides direct access to the intersection, further aggravates the situation. This study aims to assess the intersection’s performance and propose solutions to enhance traffic efficiency and reduce fuel loss. Data were collected over two weekdays and one weekend day across three time periods. The analysis was conducted using the Indonesian Highway Capacity Guidelines (PKJI 2023) and PTV VISSIM microsimulation, with fuel consumption estimated using the LAPI ITB (2003) and Lamsal ATIS-India (2013) methods. The findings indicate that the current condition experiences a high degree of saturation (maximum 1.84), with average delays of 334.54 seconds per smp (PKJI) and 235.5 seconds per vehicle (VISSIM). Fuel losses were estimated at approximately IDR 3.6 million using the LAPI ITB method and IDR 1.4 million using the Lamsal method. Among the three proposed alternatives, Alternative 3 proved to be the most effective, involving the conversion of Jalan Garuda to a one-way street, prohibition of right turns, and adjustment of the signal cycle to 156 seconds. This scenario reduced delays to 129.6 seconds per vehicle and significantly lowered fuel losses. Despite improvements, the intersection still operates at Level of Service F.