1. Ph.D. Scholar, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Private Bag 92019, Auckland 1142, New Zealand (corresponding author).
2. Senior Lecturer, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
3. Lecturer, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
4. Principal Pavement Engineer, New Zealand Transport Agency, Level 7, Pacific Brands House, 123 Victoria St., P.O. Box 1479, Christchurch 8140, New Zealand.