G. . G. Sofia, A. . H. Al-Haddad, and I. . Saeed Al-Haydari, “Development of Delay Models for Roundabouts”, J. eng. sustain. dev., vol. 16, no. 1, pp. 75–91, Mar. 2012, Accessed: Jul. 03, 2025. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1163