1. Texas Department of Transportation, 4777 East U.S. Highway 80, Mesquite, TX 75150
2. Center for Transportation Research, University of Texas at Austin, 1616 Guadalupe Street, Suite 4.202 D9300, Austin, TX 78701
3. Center for Transportation Research, University of Texas at Austin, 301 East Dean Keeton Street, Stop C1761, Austin, TX 78712