1. Research Associate, Louisiana Transportation Research Center, Louisiana State Univ., Baton Rouge, LA 70808, US
2. Graduate Student, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803, US
3. Research Professor, Louisiana Transportation Research Center, Louisiana State Univ., Baton Rouge, LA 70808, US (Corresponding author), e-mail: cefars@lsu.edu
4. Geotechnical Explorations & Investigations Engineer Manager, Louisiana Dept. of Transportation & Development, Baton Rouge, LA 70806, US