More stuff from out west to (possibly) add:
NV439 is a relatively new highway designation. There are
BEGIN and
END signs at I-80 (exit 32), and it extends 6.25 miles to the
end of pavement, according to
NDOT (page 192 for map).
These next two are signed, but barely; apologies if these were already discussed and agreed to be nixed when Nevada highways were added way back when. NV880 starts on Wedekind Rd at Malapi Way, goes east and uses Farr Ln and Queen Way to end at NV445. It has
one ancient sign EB at the western terminus. NV894 begins at US93 south of JCT US6/50 and ends in the middle of nowhere, er, Shoshone, 16.6 miles down the road. I'm not sure if this counts for inclusion, as the only signage I see is
junction signage on US93 for it, but figured I'd include it for thoroughness.
Hope this helps.
v.