Ambak, Kamarudin, Norfatehah Abdul Rahim, and Naida Rosli. “Innovation of Sustainable and Greener Raised Median or Road Divider on Expressway”. International Journal of Sustainable Construction Engineering and Technology 11, no. 3 (December 10, 2020): 27–35. Accessed May 7, 2024. https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/4378.