This is the basic syntax you need to get a complete routebox on the article page, just place this before any other text and fill in the variables. Note that this is a complete list of every variable that can be used with Infobox road and that many are unnecessary in most cases. Variables that are empty can be omitted.

{{Infobox road
|marker_image=
|state=
|highway_name=
|name_notes=
|type=
|route=
|alternate_name=
|maint=
|section=
|map=
|length_mi=
|length_round=
|length_ref=
|length_notes=
|established=
|decommissioned=
|direction_a=
|starting_terminus=
|beltway_city=
|junction=
|direction_b=
|ending_terminus=
|counties=
|cities=
|system=
|previous_type=
|previous_route=
|next_type=
|next_route=
|browse=
|commons=
}}

For the above parameters here's what you should fill in:

• marker_image: shield image to be displayed
• state: two-letter abbreviation, state that the article route is located in
• highway_name: road name to be displayed; only use this if the road is unnumbered. If it has a number, use alternate_name.
• name_notes: foot notes that will be displayed in small text underneath the highway name
• type: usually the two-letter state abbreviation for state roads; see the state WikiProject for more details
• route: This is the number of the route the article is about
• alternate_name: Use in situations where the entire route has another name (i.e. NY 590 is called the Sea Breeze Expressway for its entire length)
• maint: The agency that maintains the highway
• section The section of code that defines this route. Only CA and WA use this, and the appropriate subpage [[/CA law]] for example must be set up.
• map: image name of a map for the route, width should be 290px; see the maps task force for maps
• length_mi: This is the length of the route in miles. If you specify beyond integers (i.e. add a decimal value) you will need to set the following paramater, length_round
• length_round: If your value for length_mi is a whole number, you can omit this. Otherwise it needs to be set to the decimal precision of the length_mi paramater.
• length_ref: To do what a good article writer should, provide your reference for the length of the route using standard <ref> method.
• length_notes: see below
• established: This is the date the route was commissioned or assigned to its current alignment
• decommissioned: date the route was decommissioned
• direction_a: This should be either south or west to keep in accordance with the U.S. Roads parent project, which lists termini and junctions in progression travelling from West to East and South to North.
• starting_terminus: This is where the route begins and is either at the southern terminus or western terminus.
• beltway_city: for beltways. This is the city that the beltway encircles
• junction: a list of major junctions. Each WikiProject has different standards for major junctions, so consult the relevant WikiProject for more details.
• direction_b: The opposite of direction_a
• ending_terminus: where the route ends, in accordance with the guidelines set forth with starting_terminus
• counties: a list of counties that the route enters
• cities: a list of cities that the route enters
• system: the highway system that the article route is part of
• previous_type: This is the type of route that preceeds the current one in the system. The value for this is: Interstate, US, or (State) for Interstates, U.S. Routes and other state roads, respectively. Each state has a different parameter for state roads, so consult the WikiProject if in doubt.
• previous_route: The number of the route preceding this one
• next_type: Same as previous_type but for the route following this one
• next_route: The number of the route succeeding this one
• browse: use to add additional browse lines
• commons: use to add link to image gallery or category in commons, input should be gallery, category, or left blank

If neither length_mi nor length_km exists, no length is displayed.

Otherwise, if length_first is either mi or km, that one appears first. Ensure that this one is defined, or it will show up blank.

Otherwise, if only one of length_mi or length_km is defined, that one appears first. The other is calculated and rounded to length_round (default 0) places. Be sure to avoid false precision.

length_ref, if defined, appears after the first length. Use a citation or {{fact}} here. Be sure that the first length is the one for which you have a reference.

length_notes, if defined, appears as a note below the length. This can be used to show former length, or future length, etc.