1. D.Sc. Student, Dept. of Transportation Engineering, Sao Carlos School of Engineering, Univ. of Sao Paulo, Avenida Trabalhador Sao-Carlense, 400, Parque Arnold Schimidt, Sao Carlos, SP 13566-590, Brazil (corresponding author).
2. Professor, Dept. of Transportation Engineering, Sao Carlos School of Engineering, Univ. of Sao Paulo, Avenida Trabalhador Sao-Carlense, 400, Parque Arnold Schimidt, Sao Carlos, SP 13566-590, Brazil.