Heads up. The distinction between highway=residential and highway=track is a commonly confused distinction. These keys discuss USAGE, and not the quality of the road. highway=track should be used when the road is used to access land (like a farmer's field or a clearing in the woods for logging). Some of these roads you tagged here are used to access buildings (homes). 

Quality of the road can be captured with smoothness=*, width=* tracktype=*. 

https://wiki.openstreetmap.org/wiki/Key:highway