Lua error in Module:Infobox_road/browselinks at line 679: bad argument #3 to 'format' (string expected, got nil).
{{{embed}}}
{{infobox state highway system|title=|shields=|caption=|map=|map_alt=|map_notes=|maint=|formed=|length_mi=|length_ref=|interstate=|us=|statehwy=|notes=|links=}}
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 (links=state abbreviation); 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.