Welcome to the I-39/U.S. 20 Improvement Project Web site. 

The Illinois Department of Transportation (IDOT) has initiated a Phase I preliminary engineering study to evaluate alternatives for improvements to I-39/US 20/US 51 from the I-39/US 20 Interchange to the Harrison Avenue Interchange (Project Map). The study includes alternatives for:

• reconstructing the I-39 and U.S. 20 interchange,
• reconstructing the U.S. 20 and Harrison Avenue interchange, and
• constructing additional lanes on U.S. 20 between the interchanges

The purpose of this site is to communicate important project-related information and encourage public interaction during the planned public involvement meetings. We look forward to your participation and feedback.

Please choose a topic below to learn more. Or, if you have any questions, please contact us.

• Project Description
• Project Location
• Purpose and Need
• Public Involvement
• The Study Process
• Project Exhibits
• Traffic Projections
• Aerial Photography
• Environmental Information
• Project Schedule