1. Graduate Assistant Researcher, Texas A&M Transportation Institute, College Station, TX 77843 (corresponding author).
2. Graduate Assistant Researcher, Texas A&M Transportation Institute, College Station, TX 77843.
3. Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843.
4. Zachry Professor I, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843.
5. Associate Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843.