Query All Roads with Overpass API and export as polygon

Question

I have a query for Overpass API.

   mybbox = '8.9281,48.4379,9.1794,48.5827'
    overpass_url = "http://overpass-api.de/api/interpreter"
    overpass_query = """
    [out:json];
    // gather results
    (
      // query part for: "highway=*"
      node["highway"]("""+mybbox+""");
      way["highway"]("""+mybbox+""");
      relation["highway"]("""+mybbox+""");
    );
    // print results
    out center;
    >;
    out skel qt;
    """

I save result to a .json file. And the type is way. But I want to define a road width and export road data as polygon. For example if highway == motorway the road must be a polygon type and its width must be 4 meters. Is it possible?

Answer 1

As the others say, it is not possible to get the road width via Overpass API; you have to calculate it yourself. The API only serves to look up various objects of interest and to download them. You may filter the results using a tag, eg [width] or similar: there are alternatives like est_width or width_street . To find out how frequently each tag is used and which variant fits your needs, see this page with stats on usage (use the search box on right).