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- Co-Director, BicyclingPlus
- Assistant Professor, Design
- Professor, Civil and Environmental Engineering
- Professor, Mechanical and Aerospace Engineering
- Professor Emeritus, Graduate School of Management
- Professor, Electrical and Computer Engineering
- Director, 3 Revolutions Future Mobility Program
- Associate Professor, Department of Environmental Science and Policy
- TTP Graduate Group Chair
- TTP Graduate Advisor
- Associate Professor & Co-Director, Center for Environmental Behavior
