1. Formerly, Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803.
2. Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803 (corresponding author).
3. Senior Pavement Research Engineer, Louisiana Transportation Research Center, Baton Rouge, LA 70808.
4. Pavement Geotechnical Research Administrator, Louisiana Transportation Research Center, Baton Rouge, LA 70808.