Roadwork on U.S. 67 near Monmouth starts Feb. 17 with delays

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The Illinois Department of Transportation will begin a multi-year construction project on U.S. Route 67 in Warren County, Illinois near the city of Monmouth on February 17. The work will include resurfacing, widening shoulders, replacing guardrails and culverts, and adding turn lanes, with intermittent daytime lane closures and traffic delays expected throughout the duration of the project, which is scheduled to be completed in November 2027.

Why it matters

This major infrastructure project on a key regional highway will impact commuters, commercial traffic, and local residents in the Monmouth area for several years. Drivers will need to plan for delays, consider alternate routes, and exercise caution in the work zones.

The details

The U.S. 67 project will stretch from south of 270th Street to approximately 1 mile north of the U.S. Route 34 intersection at Monmouth. In addition to resurfacing and shoulder widening, the work will involve replacing guardrails and culverts, as well as adding new turn lanes. Intermittent daytime lane closures with flaggers controlling traffic will be in place, and temporary signals will be used in areas where culverts are replaced.

• The construction project begins on February 17, 2026.
• The project is expected to be completed in November 2027.

What’s next

Motorists should check IDOT's website and social media channels for the latest updates on lane closures and traffic impacts throughout the duration of the project.