1. Graduate Research Assistant, Texas Transportation Institute, 3135 TAMU, College Station, TX 77843.
2. Associate Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., 3136 TAMU, College Station, TX 77843.
3. Associate Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., 3136 TAMU College Station, TX 77843.