1. Assistant Professor, Universidade de Passo Fundo – RS, Brazil; Visiting Scholar, Zachry Dept. of Civil Engineering, Texas A&M Univ., 3136 TAMU, College Station, TX 77843.
2. Associate Professor, Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
3. Texas A&M Transportation Institute, College Station, TX 77843.