Dr. DingXin (Ding) Cheng is the O’Connell professor of the department of civil engineering at the California State University, Chico, director of the California Pavement Preservation (CP2) Center, and the director of the Tire Derived Aggregate Technology Center. He obtained his Ph.D. in the areas of pavement materials and transportation from Texas A&M University in College Station, Texas in 2002. He worked in private industry for Parsons Brinckerhoff in Houston, TX before joining the Chico State University. He has extensive experiences in Hot Mix Asphalt (HMA) materials and pavement preservation on both asphalt and concrete pavements, and tire derived aggregate (TDA). Ding has co-managed or managed more than $8 million research projects funded by California Department of Transportation (Caltrans), California Department of Resources Recycling and Recovery (CalRecycle), Metropolitan Transportation Commissions (MTC) of San Francisco Bay Area, and other agencies and industry. Dr. Cheng serves as the Chair of the Transportation Research Board (TRB) Pavement Preservation Committee and as a member of the TRB Pavement Maintenance Committee. In the past, he served on the Federal Highway Administration (FHWA) Pavement Preservation Expert Task Group, and National Cooperative Highway Research Project (NCHRP) panels.