1. Ph.D. Candidate, Dept. of Agricultural and Biosystems Engineering, Iowa State Univ., Ames, IA.
2. Professor, Dept. of Civil, Construction, and Environmental Engineering, and Director, Program for Sustainable Pavement Engineering and Research, Iowa State Univ., Ames, IA.
3. Associate Director, Program for Sustainable Pavement Engineering and Research, Institute for Transportation, Iowa State Univ., Ames, IA.
4. Transportation Practice Area Leader, Michigan Tech Research Institute, Ann Arbor, MI.
5. Vice President, Applied Pavement Technology, Inc., Urbana, IL.