Fadare, S. O., C. A. Wojuade, and G. A. Durodola. 2007. “CONTRIBUTION OF COMMERCIAL VEHICLES TO TRAFFIC CONGESTION IN CORE AREA OF IBADAN, NIGERIA”. LAUTECH Journal of Engineering and Technology 4 (2):92-97. https://laujet.com/index.php/laujet/article/view/175.