Today I had no intention to map anything.
Since the rain flooded parts of the main road home this noon, I had to take small side roads. So I started up my laptop and TangoGPS to check where I was going... Unfortunately I got lost in a white zone on the map, and ended up making a 30 mins detour, and as much new GPS tracks...
Once home, I wanted to mark the flooding areas on the highway, but found that there is no tag for it. I temporarily used hazard=flooding, inspired by the French "route inondable" road sign ( as shown here : http://commons.wikimedia.org/wiki/File:30Lecques1839.JPG ).
Any better suggestions ?