Soltani, Nemat, Mahmoud Saffarzadeh, and Ali Naderan. “Multi-Level Crash Prediction Models Considering Influence of Adjacent Zonal Attributes”. Civil Engineering Journal 5, no. 3 (March 18, 2019): 649–661. Accessed September 11, 2025. https://civilejournal.org/index.php/cej/article/view/1240.