1. Research Associate, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX 79968 (corresponding author).
2. Professor, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX 79968.
3. Professor, Dept. of Civil and Environmental Engineering, Worcester Polytechnic Institute, Worcester, MA 01609.
4. Research Associate, Center for Transportation Infrastructure Systems, Univ. of Texas at El Paso, El Paso, TX 79968.