S. HEMANTH LAXMAN KUMAR, Dr. SIVAGAMI. “ULTRASONIC PROGRAMMED VEHICLE STOPPING MECHANISM FOR FORWARD IMPACT EVASION IN HIGHWAYS”. International Journal of Advanced Science and Technology, Vol. 29, no. 6s, Apr. 2020, pp. 2573-8, http://sersc.org/journals/index.php/IJAST/article/view/11927.