1. Vice President, Silver Spring Engineering, Inc., 17700 Hidden Garden Lane, MD 20961. E-mail: clwu@ssengineeringus.com
2. Professor, Dept. of Civil and Coastal Engineering, Univ. of Florida, Gainesville, FL 32611. E-mail: tia@ce.ufl.edu
3. State Pavement Evaluation Engineer, Florida Dept. of Transportation, Gainesville, FL 32609. E-mail: bouzid.choubane@dot.state.fl.us