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| <nowiki>=== US, State, and County Route Naming ===</nowiki>
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| The following naming conventions are used in Illinois for US, State, and County route naming.
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| <nowiki>'''</nowiki>US Highways<nowiki>'''</nowiki> <nowiki>[[File:Illinois-US66-Shield.png|40px|text-bottom]]</nowiki><nowiki><br /></nowiki>
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| US Highways (or routes) are named in Illinois using the standard US <nowiki>[[Road names#United_States_Numbered_Highways|Road Naming]]</nowiki> guidelines. The base format of the name for these road types is:
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| <nowiki>:</nowiki><nowiki>'''</nowiki>US-66<nowiki>'''</nowiki> For U.S. Route 66
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| <nowiki>'''</nowiki>State Highways (Routes)<nowiki>'''</nowiki> <nowiki>[[File:Illinois-IL23-Shield.png|40px|text-bottom]]</nowiki><nowiki><br /></nowiki>
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| Illinois state highways are named as follows:
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| <nowiki>:</nowiki><nowiki>'''</nowiki>SR-23<nowiki>'''</nowiki> For Illinois Route 23
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| <nowiki>:</nowiki><nowiki>'''</nowiki>SR-23 S<nowiki>'''</nowiki> For Illinois Route 23, Southbound
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| <nowiki>:</nowiki><nowiki>'''</nowiki>SR-23 BUS<nowiki>'''</nowiki> For Illinois Route 23 Business
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| <nowiki>:</nowiki><nowiki>'''</nowiki>SR-23 BUS N<nowiki>'''</nowiki> For Illinois Route 23 Business, Northbound
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| <nowiki>:</nowiki><nowiki>'''</nowiki>SR-23 ALT<nowiki>'''</nowiki> For Illinois Route 23 Alternate
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| <nowiki>:</nowiki><nowiki>'''</nowiki>SR-23 ALT S<nowiki>'''</nowiki> For Illinois Route 23 Alternate, Southbound
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| <nowiki>:</nowiki><nowiki>''</nowiki>Note: BUS <nowiki>'''</nowiki>must<nowiki>'''</nowiki> be completely in uppercase when used for proper TTS<nowiki>''</nowiki>
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| <nowiki>'''</nowiki>County Highways<nowiki>'''</nowiki> <nowiki>[[File:Illinois-PerryCH4-Shield.png|40px|text-bottom]]</nowiki><nowiki><br /></nowiki>
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| County highways in Illinois are named with a "CH" prefix as illustrated below.
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| <nowiki>:</nowiki><nowiki>'''</nowiki>CH-4<nowiki>'''</nowiki> For County Highway 4
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| <nowiki>:</nowiki><nowiki>'''</nowiki>CH-4 S<nowiki>'''</nowiki> For County Highway 4, Southbound
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| <nowiki>:</nowiki>Where Counties have highway designations beginning with a letter, the format looks like this:
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| <nowiki>:</nowiki><nowiki>'''</nowiki>CH-T4<nowiki>'''</nowiki> For County Highway T4
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| <nowiki>:</nowiki><nowiki>'''</nowiki>CH-T4 E<nowiki>'''</nowiki> For County Highway T4, Eastbound
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| Proper sourcing of county routes and highways is important for applying road type guidance (<nowiki>[[Road types]]</nowiki>). CH may or may not always be shielded. Sources other than <nowiki>[[Map_Editor_Interface_and_Controls#Street_View |WME SV]]</nowiki> may need to be used. <nowiki>{{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}}</nowiki>. In order of preference, source county route/highway numbering from WME SV images less than three years old (consult <nowiki>[[Illinois#Area_Managers |LAM or SM]]</nowiki> if images are older), published county information, or the IDOT county highway maps available at <nowiki>[http://www.idot.illinois.gov/transportation-system/Network-Overview/highway-system/maps IDOT Maps.]</nowiki>
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| <nowiki>'''</nowiki>County Roads<nowiki>'''</nowiki><nowiki><br /></nowiki>
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| Rural counties in Illinois employ a geographic coordinate system to name roads outside established communities. These roads are prefixed with a "CR." These names employ a number and a cardinal direction, general north (N) or east (E) of a specified locus. For example:
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| <nowiki>:</nowiki><nowiki>'''</nowiki>CR-1000 E<nowiki>'''</nowiki> Refers to county road 1000 E
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| <nowiki>:</nowiki><nowiki>'''</nowiki>CR-3000 N<nowiki>'''</nowiki> Refers to county road 3000 N
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| <nowiki>'''</nowiki>Township Roads<nowiki>'''</nowiki><nowiki><br /></nowiki>
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| A select few counties may employ township roads. Please consult with the state managers before editing names of township roads.
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| US, State, and County Route Naming
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| The following naming conventions are used in Wisconsin for US, State, and County route naming.
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| US Highways
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| US Highways (or routes) are named in Wisconsin using the standard US Road Naming guidelines. The base format of the name for these road types is:
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| US-12 For U.S. Route 12
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| US-12 S For U.S. Route 12, Southbound
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| US-12 BUS For U.S. Route 12 Business
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| State Highways (Routes)
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| Wisconsin state highways are named as follows:
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| WIS-29 For Wisconsin Route 23
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| WIS-29 S For Wisconsin Route 23, Southbound
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| Note: BUS must be completely in uppercase when used for proper TTS
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| County Highways
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| County highways[County Trunk Highway(CTH)] in Wisconsin are named with a "CH" prefix as illustrated below.
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| CH-A For County Highway A
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