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- United States. Bureau of Transportation Statistics10
- Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)5
- International Steering Committee for Global Mapping (ISCGM)4
- United States. Federal Highway Administration.3
- Federal Transit Administration (FTA)2
- United States. Department of Transportation. Research and Innovative Technology Administration2
- FHWA1
- Federal Aviation Administration1
- Federal Highway Administration1
- Federal Motor Carrier Safety Administration1
- Federal Railroad Administration (FRA)1
- United States. Bureau of the Census.1
- United States. Federal Aviation Administration.1
- United States. Federal Motor Carrier Safety Administration.1
- Vanderbilt Engineering Center for Transportation Operations and Research Vanderbilt University1
- Volpe NTSC1