Stepanović, Nemanja, Vladan Tubić, and Stefan Zdravković. “Determining Free-Flow Speed on Different Classes of Rural Two-Lane Highways”. Promet - Traffic&Transportation 35, no. 3 (June 28, 2023): 315–330. Accessed November 23, 2024. https://traffic2.fpz.hr/index.php/PROMTT/article/view/195.