[1] Inst. for Transp. Res. and Education, North Carolina State University, Centennial Campus Box 8601, Raleigh, NC 27695, United States
[2] Department of Civil Engineering, North Carolina State University, Raleigh, NC 27695-7908, United States
[3] California Dept. of Transportation, 1910 Olympic Boulevard, Walnut Creek, CA 94596, United States