Wikipedia:WikiProject U.S. Roads/Maps task force

Maps
A department of the U.S. Roads WikiProject
The U.S. Roads WikiProject
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The Maps Department creates and maintains system and route maps for use on road-transportation-related articles. The department is responsible for creating and maintaining a standard appearance for road-related maps. Any state is welcome here.

The department is also tasked with creating Keyhole Markup Language (KML) files for articles. The KML file specifies a set of features (place marks, images, polygons, textual descriptions, etc.) for display in Google Earth, online mapping services, or any other geospatial software. On Wikipedia, these files are used in two places. By converting KML to the GeoJSON format, we are able to create interactive maps for the infobox. The file also draws these lines on the popup WikiMiniAtlas that appears through the -icon in the top right corner of articles once a KML file is created and added using {{Attached KML}}.

A tutorial on how to make maps or KML files can be found here.