Yusuf, Nahry, and Dwi Setiyadi Sudrajat. “THE IMPACT OF ROAD GRADIENT AND TRUCK COMPOSITION ON THE TOLL ROAD TRAFFIC PERFORMANCE”. PLANNING MALAYSIA 16, no. 5 (July 25, 2018). Accessed April 3, 2025. https://mail.planningmalaysia.org/index.php/pmj/article/view/413.