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Department of Transportation


Serve the United States by ensuring a fast, safe, efficient, accessible and convenient transportation system that meets our vital national interests and enhances the quality of life of the American people, today and into the future.
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GPS Roles and Responsibilities

  • Serves as the lead civilian agency within the U.S. government on GPS-related issues.
  • Co-chairs the National Executive Committee for Space-Based Positioning, Navigation, and Timing and its subordinate bodies. Learn more about the committee
  • Provides resources to the Department of Defense for new, civil-unique GPS capabilities. Learn more about GPS funding
  • Operates the Wide Area Augmentation System (WAAS) to support aviation safety and efficiency.
    WAAS diagram
    Learn more about WAAS
  • Operates the terrestrial component of the Nationwide Differential GPS System (NDGPS) to support surface transportation safety and efficiency. Learn more about NDGPS
  • Chairs the Civil GPS Service Interface Committee (CGSIC). Learn more about CGSIC
  • Applies GPS technology to a broad variety of governmental activities, including the development of the Next Generation Air Transportation System (NextGen) and intelligent transportation systems.

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