Illinois/Resources/Main

Statewide

• Functional Classification Maps

The Illinois DOT (IDOT) has confirmed that the GIS-based interactive maps are more current than the 5-Year PDF maps. The PDF maps require additional manual steps to update and may lag.

It is important to note that the interactive (GIS-based) functional classification map uses a third-party base map whose accuracy in road naming cannot be guaranteed. While the functional classification (FC) indications are provided by the State, the third-party base map data is not an appropriate external source of information (see Using external sources).'

For additional information on matching road types to FC, please see Road Type (Functional Classification).

• Functional Classification for entire State (Interactive)
• Functional Classification Maps by County (PDF)

• General Highway Maps for cities and counties from IDOT
• Illinois Virtual Tollway
• USGS National Map Viewer (sometimes quite out of date)
• 2011 Boundary and Annexation Survey Maps from US Census Bureau
• Google Map Tools (useful for drawing arbitrary polygons to use in AM requests)
• Illinois High Speed Rail Crossing Closures

City of Chicago

• Interactive map showing speed and red light camera placement
• List of red light cameras

Additional Resources

• Illinois/Reference information