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==== Road naming ====
In Illinois, [[Road names/USA|USA road naming]] guidance is followed with the following local exceptions::* State Routes or Highways are named with '''SR-XXX'''.:* County Routes or Highways are named '''CH-XXX'''.:* County Roads are named '''CR-XXX'''.:* Township Roads are named '''TR-XXX'''.
Numbering and direction follow USA [[Road names|road naming]] guidance above. When county highways contain a letter, the format is '''CH-XNN'''. For example, '''CH-W25'''.
County routes or highways may or may not be shielded. These roads nearly always Highways (CH) typically carry a local locally designated primary street nameused for addressing. CHhave 1- designations apply to 3 a alphanumeric character designation (e.g. CH-7 and CH-A19) usually listed as alternate names almost exclusivelyname. The designation is used to identify county routes for proper application of {{strikethrough|CH may be assigned a higher road type classification ([[Road types/USA#Quick_reference_chart |road typesFC Quick Reference Chart]]).}}
Proper sourcing of county routes and highways is importantWhen used, County Roads (CR) are coordinate-based, 3-4 digits with a cardinal direction (e.g. The interactive IDOT functional classification map uses a thirdCR-party base map source which may not be correct. In order of preference, source county route/highway numbering from county website, 2300 E or the IDOT county highway maps available at [http://wwwCR-600 N).idotThey are used for addressing.illinoisCR designations are generally primary names for this reason, but may be listed as alternate.gov/transportation-system/Network-Overview/highway-system/maps{{strikethrough| IDOT MapsThere is no special consideration for CR in functional classification and road types.]}}
Proper sourcing of county routes and highways is important {{red|for applying road type guidance ([[road types]])}}. CH may or may not always be shielded. Sources other than [[Map_Editor_Interface_and_Controls#Street_View |WME SV]] may need to be used. {{u|The interactive IDOT functional classification map uses a third-party base map source which is subject to copyright restrictions and may not be correct, therefore, it should not be used as a source for naming information}}. In order of preference, source county route/highway numbering from WME SV images less than three years old (consult [[Illinois#Area_Managers |LAM or SM]] if images are older), published county information, or the IDOT county highway maps available at [http://www.idot.illinois.gov/transportation-system/Network-Overview/highway-system/maps IDOT Maps.] ''The naming of guidance for county highways was changed in June July 2016. Previously, county routes highways were also labeled "CR-" and should be updated to the new guidancewhen on a segment. Care must be taken to not change the naming of county/township roads which are currently named using "CR-." See the state to-do list for counties outstanding.'' == Additional Changes ==This will require additional updates to the [[Highway naming]] page to reflect amended guidance. Need to update [[National_resources/Functional_classification | Functional Classification]] page with usage of interactive map.
== Discussion ==
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This proposal is under discussion on the forums, at the following link:
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