1. M.Sc. Student, School of Engineering, Univ. of Nairobi, Nairobi 00100, Kenya.
2. Ph.D. Candidate, School of Engineering, Univ. of British Columbia, Kelowna, Canada V1V 1V7.
3. Engineering Technical Head, Infrastructure Planning, City of Calgary, Calgary, Canada T2P 2M5.
4. Professor, School of Engineering, Univ. of British Columbia, Kelowna, Canada V1V 1V7.
5. Associate Professor, School of Engineering, Univ. of British Columbia, Kelowna, Canada V1V 1V7 (corresponding author).