=== US, State, and County Route Naming ===
The following naming conventions are used in Illinois for US, State, and County route naming.
'''US Highways''' [[File:Illinois-US66-Shield.png|40px|text-bottom]]<br />
US Highways (or routes) are named in Illinois using the standard US [[Road names#United_States_Numbered_Highways|Road Naming]] guidelines. The base format of the name for these road types is:
:'''US-66''' For U.S. Route 66
'''State Highways (Routes)''' [[File:Illinois-IL23-Shield.png|40px|text-bottom]]<br />
Illinois state highways are named as follows:
:'''SR-23''' For Illinois Route 23
:'''SR-23 S''' For Illinois Route 23, Southbound
:'''SR-23 BUS''' For Illinois Route 23 Business
:'''SR-23 BUS N''' For Illinois Route 23 Business, Northbound
:'''SR-23 ALT''' For Illinois Route 23 Alternate
:'''SR-23 ALT S''' For Illinois Route 23 Alternate, Southbound
:''Note: BUS '''must''' be completely in uppercase when used for proper TTS''
'''County Highways''' [[File:Illinois-PerryCH4-Shield.png|40px|text-bottom]]<br />
County highways in Illinois are named with a "CH" prefix as illustrated below.
:'''CH-4''' For County Highway 4
:'''CH-4 S''' For County Highway 4, Southbound
:Where Counties have highway designations beginning with a letter, the format looks like this:
:'''CH-T4''' For County Highway T4
:'''CH-T4 E''' For County Highway T4, Eastbound
Proper sourcing of county routes and highways is important 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.]
'''County Roads'''<br />
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:
:'''CR-1000 E''' Refers to county road 1000 E
:'''CR-3000 N''' Refers to county road 3000 N
'''Township Roads'''<br />
A select few counties may employ township roads. Please consult with the state managers before editing names of township roads.
US, State, and County Route Naming The following naming conventions are used in Wisconsin for US, State, and County route naming. US Highways 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: US-12 For U.S. Route 12 US-12 S For U.S. Route 12, Southbound US-12 BUS For U.S. Route 12 Business
State Highways (Routes) Wisconsin state highways are named as follows: WIS-29 For Wisconsin Route 23 WIS-29 S For Wisconsin Route 23, Southbound Note: BUS must be completely in uppercase when used for proper TTS
County Highways County highways[County Trunk Highway(CTH)] in Wisconsin are named with a "CH" prefix as illustrated below. CH-A For County Highway A