His research areas include modeling naturalistic driving studies, human factor and traffic safety, transportation infrastructure safety evaluation, and advanced vehicle proactive safety device evaluation. Dr. Guo has been principal investigator (PI) and co-PI for more than 30 research projects. He is the Chair of Transportation Statistics Interested Group of the American Statistical Association and member of two committees of Transportation Research Board of the National Academies. He served as a member of the National Academy of Sciences Panel Study on Research Methodologies and Statistical Approaches to Understanding Driver Fatigue Factors in Motor Carrier Safety and Driver Health. Dr. Guo holds a Ph.D. degree in transportation engineering and a Ph.D. in statistics, both from University of Connecticut.