1. Assistant Professor, Civil Engineering Dept., Ohio Univ., Athens, OH 45701 (corresponding author).
2. Graduate Research Assistant, Civil Engineering Dept., Ohio Univ., Athens, OH 45701.
3. Professor, School of Electrical Engineering and Computer Science, Ohio Univ., Athens, OH 45701.
4. Asphalt Materials Engineer, Ohio Dept. of Transportation, 1600 West Broad St., Columbus, OH 43223.