Analisis Nilai International Roughness Index (IRI) untuk Pemrograman Preservasi Jalan Nasional di Sulawesi Utara. JEP [Internet]. 2025 May 31 [cited 2026 Oct. 14];1(1):29-32. Available from: https://ejournal.unsrat.ac.id/v3/index.php/jep/article/view/61354