G. Sofia, Gandhi, Abdulhaq H. Al-Haddad, and Israa Saeed Al-Haydari. “Development of Delay Models for Roundabouts”. Journal of Engineering and Sustainable Development 16, no. 1 (March 1, 2012): 75–91. Accessed June 4, 2026. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1163.