Illinois/Reference information

Statewide

Maps

• 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• USGS National Map Viewer (sometimes quite out of date)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
• Functional Classification Maps by County
• Functional Classification for entire State

Other Resources

• Google Map Tools (useful for drawing arbitrary polygons to use in AM requests)

Chicagoland

• Cook County
  • Chicago
  • GIS Consortium Covering Glenview, Winnetka, Glencoe, Northbrook, Wheeling, Morton Grove, Skokie, Des Plaines, Park Ridge, Lincolnwood, Elk Grove Village, Norridge, Riverside, Tinley Park
  • Schaumburg
  • Arlington Heights
• DuPage County
  • GIS Consortium Covering Glen Ellyn, Oak Brook, Woodridge
• Kane County
• Kendall County
• Lake County
  • GIS Consortium Covering Mundelein, Lake Forest, Lincolnshire, Buffalo Grove, Deerfield, Highland Park
• McHenry County
• Will County
• Older Kennedy Revesible times
• Newer Kennedy Revesible times with Friday Change

Downstate Counties

Note: links are GIS resources unless otherwise indicated - Sites marked with a $ have fee based access.

• Adams
• [Alexander]
• [Bond]
• Boone
• [Brown]
• [Bureau]
• [Calhoun]
• Carroll
• Cass
• Champaign
  • City of Champaign
• Christian
• Clark
• Clay
• Clinton
• Coles
• Crawford
• Cumberland
• De Witt
• DeKalb
• Douglas
• Edgar
• [Edwards]
• Effingham
• Fayette Coming soon
• Ford
• Franklin$
• [Fulton]
• [Gallatin]
• [Greene]
• Grundy
• [Hamilton]
• [Hancock]
• [Hardin]
• [Henderson]
• Henry
• [Iroquois]
• Jackson
• [Jasper]
• Jefferson
• Jersey
• Jo Daviess
• [Johnson]
• Kankakee
• Knox
• [LaSalle]
  • City of Ottawa
• Lawrence
• Lee
• Livingston $
• Logan
• Macon
• Macoupin
• Madison
• Marion
• [Marshall]
• Mason
• Massac
• McDonough
• McLean
• [Menard]
• [Mercer]
• Monroe
• [Montgomery]
• Morgan 1 | Morgan 2
• [Moultrie]
• Ogle
• Peoria
• [Perry]
• [Piatt]
• [Pike]
• [Pope]
• [Pulaski]
• Putnam
• Randolph
• [Richland]
• Rock Island
• [Saline]
• Sangamon
• Schuyler
• [Scott]
• Shelby
• St. Clair
• [Stark]
• Stephenson (use Winnebago County's GIS & pan left)
• Tazewell
  • City of Pekin
• [Union]
• Vermilion
• [Wabash]
• [Warren]
• [Washington]
• [Wayne]
• White
• Whiteside $
• Williamson
• Winnebago
• Woodford

Road Categorization

See Road names/USA, Road types/USA and Illinois/Roads by type (coming soon)

Road Construction

• Statewide: IDOT Illinois Tollway
• IDOT District 1 (Cook-DuPage-Kane-Lake-McHenry-Will): Road Closure News releases
• City of Chicago: City Daily Road Closure list