1. Department of Statistics and Actuarial Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
2. School of Mathematical and Computer Sciences, Heriot-Watt University, Dubai Campus, UAE
3. Department of Mathematics and Statistics, Wright State University, Dayton, OH, USA
4. Division of Traffic and Transportation Engineering, Building and Road Research Institute of CSIR, Kumasi, Ghana