“Analisis Nilai International Roughness Index (IRI) untuk Pemrograman Preservasi Jalan Nasional di Sulawesi Utara”, JEP, vol. 1, no. 1, pp. 29–32, May 2025, Accessed: Oct. 14, 2026. [Online]. Available: https://ejournal.unsrat.ac.id/v3/index.php/jep/article/view/61354