1. Dept. of Civil and Construction Engineering, Western Michigan Univ., Kalamazoo, MI 49008.
2. Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Campus Box 7908, Raleigh, NC 27695.
3. Application Analyst Programmer, GIS Unit, NCDOT, 1587 Mail Service Center, Raleigh, NC 27699-1587.