1. Presently, Senior Planning Specialist, Long Range Planning Division of Tennessee Dept. of Transportation, 505 Deaderick St., Suite 900, Nashville, TN 37243; formerly, Research Associate, Dept. of Civil and Environmental Engineering, Virginia Tech, 900 North Glebe Rd., Arlington, VA 22203 (corresponding author).
2. Assistant Professor, Dept. of Mathematics and Statistics, Utah State Univ., 3900 Old Main Hill, Logan, UT 84322.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 900 North Glebe Rd., Arlington, VA 22203.
4. Operations and Roadway Safety Division Head, Texas A&M Transportation Institute, 3135 TAMU, College Station, TX 77843.