1. Center for Sustainable Mobility, Virginia Tech Transportation Institute, 3500 Transportation Research Plaza, Blacksburg, VA 24061
2. Center for Sustainable Mobility, Virginia Tech Transportation Institute, and Charles Via, Jr., Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, 3500 Transportation Research Plaza, Blacksburg, VA 24061
3. Université de Tunis El Manar, Ecole Nationale d'Ingénieur de Tunis, LR11ES16 Laboratoire de Matériaux, d'Optimisation et d'Environnement pour la Durabilité, B.P. 37 Le Belvédère, 1002 Tunis, Tunisia
4. Department of Mechanical and Aerospace Engineering, New Mexico State University, Las Cruces, NM 88003.