Welcome to the Doing Business section of the IDOT website.
Per statute, IDOT is required to carry out various business and regulatory functions for all activities under its jurisdiction. This section contains the required information for those activities. Please utilize the left hand navigation menu to learn more about each business function along with the options that exists within it.
Many business functions outlined in this section require a unique identifier. IDOT will only use your SSN, FEIN, or TIN for the purpose for which it was collected. For more information, please read the Statement of Purpose for Collection of Identification Numbers.