Michael S. Mamlouk is a Professor of Civil, and Environmental and Sustainable Engineering at Arizona State University. He has many years of experience in teaching courses of civil engineering materials and other related subjects at both the undergraduate and graduate levels. Dr. Mamlouk has directed many research projects and is the author of numerous publications in the fields of pavement and materials. He is a professional engineer in the state of Arizona. He Dr. Mamlouk is a fellow of the American Society of Civil Engineers and a member of several other professional societies.   John P. Zaniewski is the Asphalt Technology Professor in the Civil and Environmental Engineering Department of West Virginia University. Dr. Zaniewski earned teaching awards at both WVU and Arizona State University. In addition to materials, Dr. Zaniewski teaches graduate and undergraduate courses in pavement materials, design and management, and construction engineering and management. Dr. Zaniewski has been the principal investigator on numerous research projects for state, federal, and international sponsors. He is a member of several professional societies and has been a registered engineer in three states. He is the director of the WV Local Technology Assistance Program and has been actively involved in adult education related to highways.