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Illinois Department of Transportation

US 40 in Troy Phase 1 Study

IDOT is performing a preliminary engineering and environmental study for potential improvements to US Route 40 from Formosa Road to IL Route 162 in Madison County, approximately 3.5 miles. This section of US Route 40 is in the Village of Troy as well as unincorporated Madison County

PUBLIC COMMENT PERIOD

IDOT hosted an in-person Public Meeting for this project on June 29, 2026.

The virtual Public Meeting is ongoing until July 17th.

All exhibits and handouts from the meeting are posted under the Get Involved tab.

IDOT would welcome input from the public on this project. 

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