The OSM map overlaid with billions of GPS signal traces. The areas in red represent potential map errors.
Areas can have bad routing for a variety of reasons: missing roads, wrong one-way streets, roads that aren’t connected and so on.
Using billions of GPS traces, MapMetrics can assess how close or far drivers are from the route that the OSM engine suggests. When MapMetrics identifies large deviations, where drivers have strayed far from the route suggested in OSM, MapMetrics highlights those map areas with a red-to-green color scale.
MapMetrics allows you to find where the map may have these issues over very large areas and enables the community to focus on the hotspots. As you can see above it’s a work in progress: MapMetrics flags, in red, Colorado ski areas and the Denver Airport. Neither of these are bad per se, but ski run and taxiway routing isn’t a thing yet! Over time, MapMetrics will filter these out to focus on just the roads.