Analisia Kinerja Simpang 4 Bersinyal Tugu Bundaran Sweta Kota Mataram

Abstract

Abstract: This study aims to analyze the performance of the Sweta Roundabout Signalized Intersection in Mataram City using the 2023 Indonesian Road Capacity Guidelines (PKJI). The study was motivated by the increasing traffic volume, which is not commensurate with the intersection’s capacity, leading to congestion, queues, and delays, especially during peak hours. The study employed a quantitative method involving geometric surveys, traffic volume surveys, signal timing observations, and analyses of capacity, degree of saturation, queue length, delay, and level of service based on the 2023 PKJI. Data collection took place over three days Saturday, Monday, and Wednesday during the morning, afternoon, and evening rush hours. The results of the study show that the highest traffic volume occurred on the approach to Sandubaya Road at 1,733.35 vehicles per hour, while the lowest volume was on Selaparang Road at 1,339.55 vehicles per hour. The capacity of each approach ranges from 1,723 to 2,370 vehicles per hour, with a degree of saturation of 0.67–0.77 and an average of 0.74. The average queue length is 83.5 meters, while the average delay is 42.55 seconds per vehicle. Based on the results of an analysis using PKJI 2023, the intersection’s Level of Service (LOS) is at Level E, indicating that operational conditions are approaching saturation. The Sweta Roundabout signalized intersection is still capable of handling traffic flow; however, signal timing optimization, control of lateral obstructions, and capacity improvements on approach roads with high saturation levels are needed to ensure the intersection’s performance remains optimal and can accommodate future increases in traffic volume.

Abstrak: Penelitian ini bertujuan untuk menganalisis kinerja Simpang Bersinyal Bundaran Sweta Kota Mataram menggunakan Pedoman Kapasitas Jalan Indonesia (PKJI) 2023. Penelitian dilatarbelakangi oleh meningkatnya volume lalu lintas yang tidak sebanding dengan kapasitas simpang sehingga menyebabkan kemacetan, antrean, dan tundaan, terutama pada jam puncak. Penelitian menggunakan metode kuantitatif melalui survei geometrik, survei volume lalu lintas, pengamatan waktu sinyal, serta analisis kapasitas, derajat kejenuhan, panjang antrean, tundaan, dan tingkat pelayanan berdasarkan PKJI 2023. Pengumpulan data dilakukan selama tiga hari, yaitu Sabtu, Senin, dan Rabu pada periode jam sibuk pagi, siang, dan sore. Hasil penelitian menunjukkan bahwa volume lalu lintas tertinggi terjadi pada pendekat Jalan Sandubaya sebesar 1.733,35 skr/jam, sedangkan volume terendah pada Jalan Selaparang sebesar 1.339,55 skr/jam. Kapasitas masing-masing pendekat berkisar antara 1.723–2.370 skr/jam dengan nilai derajat kejenuhan 0,67–0,77 dan rata-rata 0,74. Panjang antrean rata-rata mencapai 83,5 meter, sedangkan tundaan rata-rata sebesar 42,55 detik/skr. Berdasarkan hasil analisis menggunakan PKJI 2023, tingkat pelayanan simpang berada pada Level of Service (LOS) E, yang menunjukkan kondisi operasional mendekati jenuh. Simpang Bersinyal Bundaran Sweta masih mampu melayani arus lalu lintas, namun diperlukan optimalisasi waktu sinyal, pengendalian hambatan samping, serta peningkatan kapasitas pada pendekat yang memiliki tingkat kejenuhan tinggi agar kinerja simpang tetap optimal dan mampu mengakomodasi peningkatan volume lalu lintas pada masa mendatang.