Ratrout, Nedal Taisir, and Yazan F Issa. “Effectiveness of Newly Introduced Variable Message Signs in Al-Khobar, Saudi Arabia”. Promet - Traffic&Transportation 26, no. 2 (April 26, 2014): 169-177. Accessed November 24, 2024. https://traffic.fpz.hr/index.php/PROMTT/article/view/1305.