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Publisher
- ESRI252
- CHGIS, Harvard Yenching Institute56
- Esri6
- Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)2
- Department of Information Technology and Telecommunications1
- Environmental Systems Research Institute, Inc. (ESRI)1
- Federal Highway Administration (FHWA)1
- Research and Innovative Technology Administration/Bureau of Transportation Statistics1
- U.S. Geological Survey1