1. Assistant Professor, Dept. of Civil, Structural, and Environmental Engineering, Institute for Sustainable Transportation and Logistics Program Univ. at Buffalo, State Univ. of New York, 241 Ketter Hall, Buffalo, NY 14260 (corresponding author).
2. Charles Pankow Professor, Civil Engineering, School of Civil Engineering, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907-2051.