I have to apologize for posting in English in the polish forum, but I don’t speak polish…
While looking for invalid tags, I found quite a number of conditional tags, which use the wrong key:
E.g. I found maxspeed:conditional:forward which should be maxspeed:forward:conditional
The entry in the wiki about this: http://wiki.openstreetmap.org/wiki/Conditional_restrictions
Here is an overpass-turbo query for those keys: http://overpass-turbo.eu/s/8cO
Apart from that, the tags seem to be perfectly valid. As most of these ways are located in Poland (due to the rather high usage of conditional in your area), I would like to ask if you think a semi-automatic change of these tags would be ok?