1. Project Engineer, Asphalt Institute, Lexington, KY 40512.
2. Associate Professor of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506-0281.
3. Director of Research, Asphalt Institute, Lexington, KY 40512.
4. Assistant Professor of Civil Engineering, Washington State Univ., Pullman, WA 99164.
5. Research Associate, Washington State Univ., Pullman, WA 99164.