Lately I did "mapping inverted": I first mapped highway= (mostly paths) and then had a look if they do really exist. Luckily they were all there - example. Else I would have had a problem - since this were my holidays this year:
I traced a lot of paths using Bing Aerial Imagery and JOSM, put maps with them on my Garmin device and thus hiked some nice back country parts of southern Albania. There I met some really charming people (it is difficult to meet another kind of persons in Albania) and saw great landscapes.
Altogether I walked about 340 km; alone in the old town of Gjirokastra about 70 km to collect most of the street names¹.
I marked ~550 POI at the GPS device (example: "L Taci" means: on the left side amenity=fuel operator=Taci Oil)
I made 6022 pictures, of which 2701 explicitly for OSM. A lot of the others are useful for OSM, too.
416,773 points are in the GPS data uploaded to OSM and they cover
3889,4 km travelled.
~5 kg of superfluous weight lost.
Some of the pictures you can find on my homepage.
¹ whose plates were mounted after I visited it two years ago. Back then there you couldn't nearly find any street name sign. For less important towns or parts of them and villages in general this is still the situation in Albania.