initSidebarItems({"mod":[["geometry","OSM describes roads as center-lines that intersect. Turn these into road and intersection polygons roughly by 1) treating the road as a PolyLine with a width, so that it has a left and right edge 2) finding the places where the edges of different roads intersect 3) \"Trimming back\" the center lines to avoid the overlap 4) Producing a polygon for the intersection itsef"],["lane_specs",""]],"struct":[["InitialMap",""],["Intersection",""],["Road",""]]});