Hi,

All mm ways should be in m as of now.

I've shifted most of them from min/max to start/end when the road is shifting from one width to another such as this one https://www.openstreetmap.org/way/1426169241

However there are ways which do not switch from one width to another but rather have a varying widht, and in those cases min/max is appropriate. Should I ask for a wiki page to be created ?