MUHAMMAD LUQMAN; DR. SAADIA TABASSUM; DR. AMMAD HASSAN KHAN. Improvement in Level of Service (LOS) of Conventional Underpass. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 6, n. 11, p. 21–27, 2019. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/4459. Acesso em: 7 jul. 2025.