- Agency Director, Dennis L. Christiansen
- Director Emeritus, Herbert H. Richardson
- Network and Information Systems, HUB Program, Laboratory Accreditation
- Executive Associate Director, Donald W. Bugh
Business Operations - Executive Associate Director, Katherine F. Turnbull
Planning and Environment - Associate Director, Edward J. Seymour
Transportation Operations - Executive Associate Director, Jon A. Epps
Materials, Pavements and Constructed Facilities - Assistant Director, C. Eugene Buth
Roadside Safety and Physical Security - Executive Associate Director, William R. Stockton
Interdisciplinary Research
- The following centers are included in the TTI Organization:
- Center for Transportation Computational Mechanics
- Center for Railway Research
- Center for Ports and Waterways
- Center for Transportation Safety
- Center for Alcohol and Drug Education Studies
- Strategic Transportation Solutions Center
- Center for International Intelligent Transportation Research
- Southwest Region University Transportation Center
- Transportation Economics Center
- University Transportation Center for Mobility

