text: Most of the lane names are not signed, yes.
  
  They were mostly added by editors working for a company who wish to have all lanes named, apparently for navigation or something. The names themselves are specified in the GeoBase National Road Network database (used on OSM.org as "Geobase Roads - English") which is apparently how the company editors got them.
  
  For now I've given up on opposing them, though I'll support you if you want to go on a mission to abolish them.