Improving the management of highway construction projects using BOT system for heavy vehicles: A case study in Diyala: Improving the management of highway construction projects using BOT system for heavy vehicles: A case study in Diyala. Samarra Journal of Engineering Science and Research, [S. l.], v. 2, n. 3, 2024. DOI: 10.65115/7gwj8m45. Disponível em: https://www.journals.uosamarra.edu.iq/sjesr/article/view/40. Acesso em: 5 may. 2026.