The driver of a vehicle about to enter or cross a way from a private road or driveway shall yield the right of way to all vehicles approaching on said way.
N.H. Rev. Stat. Ann. § 265:32
Vehicle Entering Way From Private Road or Driveway
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.