[tomfanning]

Many of the red areas I see on the map, particularly in France, are fairly obviously where someone's been running a TomTom while on a train or a boat. Of course that's not going match OSM roads. I'm a little surprised this is not mentioned in the blog post - it seems a bit obvious.

[Nrbelex]

>"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."