Abdul Khalik Al-Taei, Dr., and د. “Gap Acceptance, and Traffic Safety Analysis On U-Turn Median OpeningsOf Arterial Roads”. Al-Rafidain Engineering Journal (AREJ) 18, no. 6 (December 28, 2010): 42–53. Accessed August 3, 2025. https://rjps.uomosul.edu.iq/index.php/arej/article/view/9884.