1. Irma Louise Rush Stewart Distinguished Professor, Dept. of Civil and Environmental Engineering, Louisiana Transportation Research Center, Louisiana State Univ., Baton Rouge, LA 70803-6419.
2. Distinguished Professor, Construction Education Trust Fund (CETF), Dept. of Construction Management, Louisiana State Univ., Baton Rouge, LA 70803-6419 (corresponding author).
3. Research Associate, Louisiana Transportation Research Center, Louisiana State Univ., 4101 Gourrier Ave., Baton Rouge, LA 70808.