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Author
- United States. Bureau of Transportation Statistics9
- Hunt, Raquel2
- Battelle Memorial Institute1
- John A. Volpe National Transportation Systems Center (U.S.)1
- Miller, David1
- Strocko, Ed1
- United States. Federal Aviation Administration1
- United States. Federal Highway Administration1
- United States. Federal Highway Administration. Office of Highway Policy Information1
- United States. Federal Transit Administration1
- Vanderbilt Engineering Center for Transportation Operations and Research1
- Waterborne Commerce Statistics Center (U.S.)1