Ponrahono, Zakiah, Noorain Mohd Isa, Ahmad Zaharin Aris, and Rosta Harun. “THE TRAFFIC VOLUME AND LEVEL OF SERVICE (LOS) OF UNIVERSITI PUTRA MALAYSIA (UPM) SERDANG CAMPUS MAIN ACCESS”. PLANNING MALAYSIA 17, no. 10 (September 4, 2019). Accessed November 5, 2024. https://mail.planningmalaysia.org/index.php/pmj/article/view/628.