Zhu, Tong, Changshuai Wang, Chenxuan Yang, and Runqing Zhao. “Evaluation of Effectiveness of Speed Reduction Markings on Driving Speed in Highway Tunnel Entrance and Exit Areas”. Promet - Traffic&Transportation 32, no. 1 (February 13, 2020): 141-152. Accessed March 29, 2024. http://traffic.fpz.hr/index.php/PROMTT/article/view/3203.