Champaign County - I-57/I-74 Reconstruction Project


View up to date information on Illinois’ Covid-19 vaccine plan and vaccination eligibility from the State of Illinois Coronavirus Response Site

Interstate 57 & Interstate 74 Interchange Reconstruction

Proposed Rendering

Project Overview

As a part of the historic and bipartisan Rebuild Illinois plan, the Illinois Department of Transportation is beginning the first step toward the reconstruction of the I-57/I-74 interchange just West of Champaign. Construction is set to begin in July of 2020 on the “periphery” structures: Mattis over I-74, Mattis over I-57, and US 150 (Bloomington Rd) over I-57. These structures will all be replaced and lengthened, allowing the bridges to accept future ramps needed for the I-57/I-74 interchange reconstruction. The cost of the two Mattis Structures is $20,849,839, and the cost of the US 150 structure is $8,367,378, which is an investment of over $29 million in the Champaign area.

The I-57/I-74 interchange was built in 1965 and is experiencing operational issues due to deficient geometric features. Design considerations for the project include the improvement of the geometric design, capacity enhancements, safety improvements and better access, among others. The planned improvements will consist of 11 new bridge structures, including 2 flyover structures in the middle of the interchange. The cost of the interchange project is estimated to be about $120 million and is currently set to be let in June of 2021.



  • What is the purpose of the project?
    • Both bridges involved with the project are in advanced stages of deterioration and are due for replacement. This also allows the department to lengthen both structures in order to accommodate new ramps that will run underneath them for the future I-57/I-74 interchange reconstruction.
  • What is the biggest benefits to the project?
    • The new bridge structures will increase safety for travelers in the area and accommodate a new ramp configuration for the new interchange.
  • What is the current traffic volume?
    • The Average Daily Traffic for each route is as follows:

      I-57 – (south of 74) – 36,100

      I-57 – (North of 74) – 23,000

      I-74 – (under Mattis Ave) – 41,400

      Mattis Ave (over I-74) – 16,100

      Mattis Ave (over I-57) – 5,800

      US 150 – 7,400

  • How much does the project cost?
    • The total project cost for both structures is $29,217,217 and is split between two contracts.

      Contract 70B38 (Mattis) - $20,849,839

      Contract 70B98 (US 150) - $8,367,378

  • What is the estimated finish time?
    • We anticipate completion of both structures by August of 2021.
  • Are there any closures planned for this project?
    • Periodic nighttime closures of the interstates will be needed for both contracts to safely remove and erect the bridge beams. This will only be allowed at night (10pm to 6am, Sunday through Thursday), and a detour will be setup during those times. All other times, at least one lane will remain open to traffic.

      Cardinal Road and Midwest Court will be closed during portions of this project as well, with detours posted during those time periods.

  • Are there any major existing road or environment hurdles that will be faced?
    • No.
  • Are there any major milestones over the course of the project?
    • Each project is being done in two stages, so one major milestone will be when each structure changes sides and construction begins on stage 2.
  • How will the project affect my regular commute?
    • Mattis over I-57 and US 150 over I-57 will be controlled by temporary bridge signals. Please allow a few extra minutes to your commute if you take these routes.
  • What impact will this have on the public transit system?
    • This project should have little to no impact on mass transit as traffic lanes will always be open during daytime running hours.
  • Will school bus routes be affected?
    • No.

Photo Gallery