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- Bureau of Transportation Statistics3
- Environmental Systems Research Institute, Inc. (ESRI)1
- National Oceanographic and Atmospheric Administration1
- Oak Ridge National Laboratories1
- Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)1
- U.S. Army Corps of Engineers1
- U.S. Bureau of Census1
- U.S. Geological Survey1
- United States. Bureau of Transportation Statistics1
- Vanderbilt Engineering Center for Transportation Operations and Research1
- Vanderbilt Engineering Center for Transportation Operations and Research Vanderbilt University1