Mat Saad, Azaruddin, and Ahmad Raqib Ab Ghani. “Risk Assessment and Safety Perceptions In The Motorcycle Lane of Butterworth - Kulim Expressway: A Case Study”. Recent Trends in Civil Engineering and Built Environment, vol. 6, no. 2, Feb. 2026, pp. 60-70, https://penerbit.uthm.edu.my/periodicals/index.php/rtcebe/article/view/15272.