1. Department of Geography and Rural Development, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
2. Regional Transport Research & Education Centre Kumasi (TRECK), Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
3. Department of Transportation and Geotechnical Engineering, University of Dar es Salaam, Dar es Salaam, Tanzania
4. Alabama Transportation Institute, University of Alabama, Tuscaloosa, USA