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- Director, Transit Research Center
- Professor Emerita, Environmental Science and Policy
- Associate Professor, Civil and Environmental Engineering
- Professor Emerita, Civil and Environmental Engineering
- Professor, Department of Environmental Science and Policy
- Co-Director, 3 Revolutions Future Mobility Program
- STEPS+ Affiliate
- Co-director, Sustainable Freight Research Program
- Assistant Professor, Civil & Environmental Engineering
2001 Ghausi Hall, 3143
- Professor, Civil and Environmental Engineering
- Principal Investigator, UC Pavement Research Center
3153 Ghausi Hall
- Director, National Center for Sustainable Transportation
- Co-Director, BicyclingPlus Research Collaborative
- Associate Director for Education, ITS-Davis
- Professor, Environmental Science and Policy
- TTP Graduate Advisor
2130 Wickson Hall
