Source Information

• International transportation data source information

  Primary source:

  Wolfram|Alpha Knowledgebase, 2024.

  Background sources and references:

  • European Commission. "Transport." Statistics. »
  • International Road Federation. World Road Statistics. »
  • United States Department of Transportation. "Highway Statistic Series." Federal Highway Administration. »
  • United States Department of Transportation. "National Transportation Statistics." Research and Innovative Technology Administration. »

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