Seems as if MS has released new ‘road detections’ GitHub - microsoft/RoadDetections: Road detections from Microsoft Maps aerial imagery this would be completly unremarkable, except that they found ~800’000km of ‘missing’ roads in the US*. Now while there is likely to be lots of ‘not actually a road’ in that data, it still would indicate that they found lots of segments that didn’t match up with the existing data. My hypothesis is that might be due to TIGER derived OSM data with geometry issues that didn’t allow matching and that the MS data might allow pinpointing that.
Can’t test that right now as I’m on the road, but maybe it is worth looking in to.
* conventional wisdom is that OSM already has more roads than actually exist thanks to TIGER.