hyphenated routes drop the suffix

[NE2]

ref=LA 611-1: http://otile4.mqcdn.com/tiles/1.0.0/osm/15/8179/13524.png
example sign: https://picasaweb.google.com/lh/photo/eqCwxYgqwttsNXA-tix1gtMTjNZETYmyPJy0liipFm0