1. Associate Engineer, Mid-Ohio Regional Planning Commission, 285 East Main St., Columbus, OH 43215. E-mail: zjiang@morpc.org
2. Professor, Dept. of Civil and Environmental Engineering and Geodetic Science, The Ohio State Univ., 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210 (corresponding author). E-mail: mccord.2@osu.edu
3. Professor, Dept. of Statistics, The Ohio State Univ., 204C Cockins Hall, 1958 Neil Ave., Columbus, OH 43210. E-mail: goel.1@osu.edu