1. Department of Civil and Environmental Engineering, College of Engineering, California Polytechnic State University, 1 Grand Avenue, San Luis Obispo, CA 93407-0353
2. 101 Kearney Hall, School of Civil and Construction Engineering, College of Engineering, Oregon State University, Corvallis, OR 97331
3. Research Section, Oregon Department of Transportation, 555 13th Street, NE, Salem, OR 97301
4. 211 Kearney Hall, School of Civil and Construction Engineering, College of Engineering, Oregon State University, Corvallis, OR 97331