1. Research Center for Territory, Transports and Environment (CITTA), 4200-465 Porto, Portugal
2. Department of Transportation and Geotechnical Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil
3. Institute for Systems Engineering and Computers of Coimbra (INESCC), 3030-290 Coimbra, Portugal
4. Department of Sciences and Technology, Universidade Aberta, 1250-100 Lisbon, Portugal
5. Department of Civil Engineering, Polytechnic Institute of Coimbra, 3045-093 Coimbra, Portugal
6. Department of Civil Engineering, University of Coimbra, 3004-531 Coimbra, Portugal