1. Consultant, AgileAssets, Inc., 3200 Atlantic Ave., Suite 10, Raleigh, NC 27604; formerly, Graduate Research Assistant, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843.
2. Associate Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., 3136 TAMU, College Station, TX 77843 (corresponding author).