[OSM-newbies] Problems with highway=(primary|secondary|tertiary) tags

[Paul Johnson]

The highway=* key seems to have some seriously inconsistent usage right 
now.

highway=trunk, cycleway, footway, track, and motorway all speak to 
physical characteristics of the way itself.  But primary/secondary/
tertiary seem to speak more to administrative features of routes that run 
over the way.

Perhaps it's time to deprecate primary/secondary/tertiary on the way and 
make these three highway= tags part of route relations, similar to how 
cycleways have NCN/RCN/LCN respectively.