Skip to main content

Welcome to IDOT's new website design! The address for some web pages has changed, so be sure to update any saved favorites as needed.

Illinois Department of Transportation

5 Year Functional Classification

FHWA Highway Functional Classification: Concepts, Criteria and Procedures

Select a map to view a graphical representation of FHWA functional classifications for roadways at different levels: County,  Township and Urban.

Functional Classification County Map

Title

Functional Classification Township Map

Title

Functional Classification Urban Area Map

Title