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Transportation System Background

Illinois is the 5 th largest economy in the nation, by GDP, and that prosperity would not be possible without our vast transportation network. For more information please visit our network overview page.

Key Transportation Metrics

Transportation Funding

Funding for IDOT projects comes from multiple sources including:

  • Rebuild Illinois
  • Motor Fuel Tax (MFT)
  • Portion of the Motor Vehicle Registration (MVR)
  • Federal Funding

The majority of these funds are allocated toward system maintenance projects. Remaining funds can then be allocated toward expansion, capacity, or other types of projects. IDOT strives to use all available funding as efficiently as possible, keeping our vital transportation network running.