1. Department of Civil and Environmental Engineering, Brigham Young University, 368 Clyde Building, Provo, UT 84602
2. Department of Civil Engineering, Texas A&M University and Texas Transportation Institute, Texas A&M University System, 3136 TAMU, College Station, TX 77843-3136
3. Department of Civil Engineering, University of Nebraska-Lincoln, P.O. Box 880531, Lincoln, NE 68588-0531