Hadji Hosseinlou, Mansour, Alireza Mahdavi, and Mojtaba Alinezhad. “Optimization of the Allowable Speed on Iran’s Freeways to Reduce Violations and Accidents, Using Zero-Truncated Poisson Regression Model”. Civil Engineering Journal 4, no. 2 (March 6, 2018): 443–449. Accessed July 1, 2025. https://civilejournal.org/index.php/cej/article/view/760.