1. Software Engineer, Windsor Circle, 212 West Main St., Suite 400, Durham, NC 27701; formerly, Graduate Student, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695.
2. Software Engineer, Nuage Networks, 755 Ravendale Dr., Mountain View, CA 94043; formerly, Graduate Student, Dept. of Computer Science, North Carolina State Univ., Raleigh, NC 27695.
3. Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695.
4. Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695 (corresponding author).