National Transportation Operations Coalition
- Partnership composed of national associations of state and local officials and transportation service providers with a common interest in understanding the concepts, practices and applications of ITS.
- http://www.ntoctalks.com/

Intelligent Transportation Systems (ITS) Research Program
- Oak Ridge National Laboratory program is a technical resource to the Federal Highway Administration (FHWA) in meeting its ITS initiative.
- http://www-cta.ornl.gov/cta/ITS.shtml

ITS America
- Advocacy group for intelligent transportation systems. Site has news releases, membership information, and descriptions of activities.
- http://www.itsa.org/

Intelligent Transportation Systems
- Independent group focusing on all aspects of intelligent transportation systems sponsored by the U.S. Department of Transportation.
- http://www.its.dot.gov/

Orbital Sciences Transportation Management Systems
- Satellite based vehicle tracking technology for public transportation systems and fleet operations.
- http://www.orbital.com/TMS/

ENTERPRISE
- U.S. federal-state cooperative program for intelligent transportation systems research, development and deployment.
- http://www.enterprise.prog.org/