Template:Infobox 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.
 * markers: Put some examples of the markers the system uses here.
 * caption: This is the markers' description, as a caption.
 * map: Put a map of the system here.
 * map_notes: This is the map's description.
 * map_alt: This is the map's alt text.
 * maint: This is the name of the agency or organization that maintains 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.
 * notes: Additional information about the highway system.
 * country, state, or province: just as with infobox road, but used to display the appropriate links at the bottom of the infobox.
 * type: Optional. Customizes the links displayed for some jurisditions based on roadway type.
 * 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.