The element of "public way" is one of the things the state of New Hampshire must prove beyond a reasonable doubt to get a DWI conviction.  So what exactly is a "public way"?  Here is the present version of New Hampshire's law and definition of public way:

                                                  RSA 259:125  (2011)

 259:125  Way.

   "Way" shall mean:

I. Except as provided in paragraph II, the entire width between the boundary lines of any public highway, street, avenue, road, alley, park or parkway, or any private way laid out under authority of statute, or any such way provided and maintained by a public institution to which state funds are appropriated for public use, or any such way which has been used for public travel thereon, other than to and from a toll bridge or ferry, for 20 years, or any public or private parking lot which is maintained primarily for the benefit of paying customers;

II. For the purposes of RSA 265:71, IV, RSA 265:79, RSA 265-A:2, I, and RSA 265-A:3, any public highway, street, avenue, road, alley, park, parking lot or parkway; any private way laid out under authority of statute; ways provided and maintained by public institutions to which state funds are appropriated for public use; any privately owned and maintained way open for public use; and any private parking lots, including parking lots and other out-of-door areas of commercial establishments which are generally maintained for the benefit of the public.