Susan Handy is a professor in the Department of Environmental Science and Policy at the University of California at Davis, where she teaches in the Environmental Policy Analysis and Planning major and in the Transportation Technology and Policy Program. She is the director of the National Center for Sustainable Transportation, part of the federal university transportation centers program. Her research focuses on the relationships between transportation and land use, particularly the impact of land use on travel behavior, and on strategies for reducing automobile dependence. Her recent work includes projects for the California Air Resources Board and Caltrans on methods for evaluating the impacts on vehicle travel of proposed land development and transportation projects. Her new book, Shifting Gears: Toward a New Way of Thinking About Transportation, is available for pre-order from MIT Press.