Template:Infobox state highway system/doc

Usage
Copy and paste the following code below:

Then fill in the fields as follows:
 * title: This is the (official) title of the system
 * shields: Put the shields the state uses here.
 * caption: This is the shields' description.
 * map: Put a map of the state here.
 * map_notes: This is the map's description.
 * map_alt: This is the map's alt text.
 * maint: This is the agency or agencies that maintain the system.
 * formed: This is the date of the system's formation (Alternate parameter: formed)
 * length_mi: or length_km: This is the length of the system. length_ref is used for the reference for this piece of information, and the template converts the given length into both systems of measurement.
 * length_notes, if defined, appears as a note below the length. This can be used to show former length, or future length, etc.
 * interstate: This is usually "Interstate X (I-X)", but it can also be "Route X", etc.
 * us: This is usually "U.S. Route X (US X)", but it can also be "Route X", etc.
 * statehwy: This is what the state calls its state highways.
 * notes: Additional information about the state highway system.
 * links: Optional. Adds links to state highway system ; for Canada, use the provincial abbreviation; for certain US national networks, use I, US, NHS, or BL/BS as appropriate
 * type: Optional. Customizes the links displayed for some states based on roadway type.
 * state: Optional. Customizes the links displayed based on state.
 * county: Optional. Customized the links displayed for some states based on county, for county roads.
 * field1–6 Optional. Allows up to six additional types of highways to be added to the list.
 * label1–6 Required only if using field1–6. Adds a label for the field1–6 lines.