This site discusses just about anything regarding the highways and state roads of New Hampshire.
I am open to comments, suggestions and especially corrections. Not much here yet other than the obligatory routes listing (but the various Route 113s are unusual enough to be a little interesting)
In addition to the numbered routes, there are many state-maintained routes or sections of roads which have names but no posted route numbers. New Hampshire does not use "secret" numbering (small numbers that don't duplicate posted state route numbers) they way some states like Connecticut do, although they do have inventory numbers. NHDOT calls these "O-Roads" although they mostly have inventory route numbers beginning with "N". There are no county routes. Other roads are city or town roads.