1. Wiss, Janney, Elstner Associates, Inc., FHWA NDE Validation Center, 6300 Georgetown Pike, McLean, VA 22101-2296
2. PSI, 6300 Georgetown Pike, McLean, VA 22101
3. Wiss, Janney, Elstner Associates, Inc., 225 Peachtree Street, Suite 1600, Atlanta, GA 30303
4. FHWA, Office of Infrastructure Research and Development, HRDI-10, 6300 Georgetown Pike, McLean, VA 22101-2296