Interstate 57 & Interstate 74 Interchange Reconstruction

Proposed Rendering

The “cloverleaf” type interchange which connects Interstate 57 and Interstate 74 in Champaign County, originally designed in 1958 and constructed in 1965, is experiencing safety and traffic operational issues due to deficient geometric features.   I-57 is a four-lane Class I truck route carrying an average of 33,600 vehicles per day of which 9,400 are trucks.  I-74 is also a four-lane Class I truck route carrying and average of 38,400 vehicles per day of which 8,500 are trucks.

A Phase I design study of the interchange, funded in 2012 by the Illinois Jobs Now program, was completed by the Illinois Department of Transportation (IDOT).  The study began in May 2012 and was completed in October 2015 and complies with the requirements of the National Environmental Policy Act of 1969.  The study documents the need for the improvement, proposes and evaluates several design alternatives that account for future transportation needs, and culminates in a single recommended design. The recommended design provides safer and more efficient transportation at the interchange by eliminating deficient geometric features and increasing traffic capacity.  Evaluation criteria used to determine the recommended design include:

  • Roadway Safety Performance
  • Roadway Operational, Geometric, and Capacity Characteristics
  • Environmental and Social Impacts
  • Economics
  • Public Input

IDOT and the Federal Highway Administration (FHWA) are the lead agencies in the planning process and have used these criteria to make the final decision on the recommended design.  Now that the completed Phase I design study has been approved by the FHWA, Phase II is underway.  Phase II, which includes plan preparation, land acquisition, utility relocation, and environmental mitigation, typically takes 2-3 years to complete after the Phase I study is approved.  Phase III, the construction phase, can consist of several construction seasons for a large project.  All of Phase II and a portion of Phase III of the I-57/I-74 interchange reconstruction project have been funded.

Note: IDOT projects typically have three distinct phases. Phase I (or the project Study) consists of developing the project scope, environmental studies and preliminary design of a project. Phase II (Design) consists of refining the design to develop contract plans and land acquisition. Phase III (Construction) consists of the actual construction of the project.


As the I-57 / I-74 Interchange Reconstruction project gets underway, IDOT will periodically update this website to assure that the motorists of Illinois are kept informed of project developments, public involvement opportunities, and construction related activities.

If you have questions about the project, please fill out the feedback form or contact us at:

Illinois Department of Transportation
Office of Communications
201 West Center Court
Schaumburg, IL 60196

Study Documents Download

IDOT is currently at the final stages of Phase I for this project. This site will be updated periodically as the project progresses. The Illinois Department of Transportation (IDOT) wishes to thank you for your support.

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