Wyoming/State Highway Relations
If a relation isn't in the list below for a given highway, please add it to the list, or create it and add it to the list if it doesn't exist. State and Federal highways should use a single relation for each highway. If highway physically splits into two ways and separates the two directions (such as an Interstate), the same relation should be used for both directions, with a role indicating north/south or east/west (see Wyoming's I-80 for an example.) A single way may have more than one relation if it is signed for more than one highway, that is, if two or more highways overlap for a distance.
Set relations as follows:
|ref=*||Highway Number. Required. Example: 789|
|modifier=*||Business routes, for example, would have a modifier of "business"|
|is_in=WY;WYO;Wyoming||Optional. Functionally equivalent to addr:state=WY, but older and therefore used by more applications, and more general.|
|symbol=*||Optional. URL to an SVG image of the route shield.
You can find these in Wikimedia commons, here. I didn't check the all, but all the half-dozen I did check were public domain, so OK to use.
|url=*||Optional. URL to a page where more can be learned about this route (often, but not always, Wikipedia).|
The name=* tag should not be marked on same relation unless the entire system has the same name. Quite often, when a state route passes through a community, it will have local name.
Check this table before creating a new relation for a WY state highway. If a relation already exists here for a given highway, use it. If the highway is not listed, create a new relation and add it to the list.