1. Department of Statistics and Operations Research, TSS-Traffic Simulation Systems, Campus Nord, Mòdul C5, Technical University of Catalonia, Jordi Girona Salgado 1-3, 08028 Barcelona, Spain.
2. Vic University and TSS Traffic Simulation Systems, Passeig de Gràcia 12, 3°, 1a, 08007 Barcelona, Spain.