Liang, Guohua, Xujiao Sun, Yidan Zhang, Mingli Chen, and Wanting Zhang. “Identifying Expressway Accident Black Spots Based on the Secondary Division of Road Units”. Promet - Traffic&Transportation 33, no. 5 (October 8, 2021): 731–743. Accessed August 26, 2025. https://traffic2.fpz.hr/index.php/PROMTT/article/view/2960.