1. Assistant Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., Box 4110, Logan, UT 84332 (corresponding author).
2. Professor, Dept. of Civil and Geological Engineering, New Mexico State Univ., Box 30001, Las Cruces, NM 88003.
3. New Mexico State and Highway Transportation Dept., 1120 Cerrillos Rd., Box 1149, Santa Fe, NM 87504.
4. PhD Candidate, Dept. of Civil and Geological Engineering, New Mexico State Univ., Box 30001, Las Cruces, NM 88003.