OSM road features are lines no polygons

[mdales]

Unfortunately OSM roads appear to be stored as line segments, and so whilst you can specify them when using the OSM feature selection of topogmesh, they don't result in any obvious output change due to having no width.

We should find a way to capture the roads and given them some artificial width, either using a fixed value or by looking for other fields in OSM data if appropriate/available.

[avsm]

Weirdly enough I was figuring this out over the weekend for another project. You can use osm2streets to help get a polygon; e.g. https://a-b-street.github.io/osm2streets/#17.94/52.202376/0.119338 (do 'import current view') and then get a geojson for the selected roads.