Dr. Clifton conducts research and teaches courses in various aspects of transportation planning and policy, including: travel behavior, land use and transportation, physical activity and health, and non-motorized modes. To date, she has served as Principal Investigator or co-Principal Investigator on funded research projects totaling nearly $2.4 million dollars as well as participating in several unfunded projects. Project sponsors include: Maryland Department of Transportation, Active Living Research Division of the Robert Wood Johnson Foundation, US General Services Administration, and the Metropolitan Washington Council of Governments. She has published articles in Transportation, Transportation Research D, Accident Analysis and Prevention, Landscape and Urban Planning, Journal of Planning Education and Research, Journal of Transportation Statistics, Journal of Public Transportation, and Transportation Research Record.Her current research projects have focused tools to aid in forecasting the demand for transportation. She was a leader in the team developing the Maryland Statewide Transportation Model, a suite of transportation, land use and economic models developed by the National Center for Smart Growth and INFORUM at the University of Maryland and PB World. Dr. Clifton has also developed a pedestrian demand model MoPeD (Model of Pedestrian Demand) in a GIS platform that predicts pedestrian volumes at the supra-neighborhood scale. Another product of her recent research efforts is PEDS (the Pedestrian Environment Data Scan), an audit tool to evaluate microscale features of the pedestrian environment. Prior to her appointment at Portland State University, Dr. Clifton held academic positions at the University of Maryland and the University of Iowa. She also worked as a researcher for the US Department of Energy in Morgantown, WV; a project manager for NuStats, a survey research firm in Austin Texas; and a transportation consulting firm, John F. Hickman and Associates in Austin, Texas. Dr. Clifton has a PhD in Community and Regional Planning from the University of Texas at Austin, MS in Planning from the University of Arizona, and BS in Mechanical Engineering from West Virginia University.
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