N.H. Rev. Stat. § 230-A:5
Any owner of land or other property aggrieved by a finding of the layout authority on the matter of occasion for the layout of a highway planning corridor or alteration thereof, may appeal to the superior court, for the county in which such land or other property is situated, by petition within 60 days after the filing of the return with the secretary of state as provided in RSA 230-A:6. The burden of proof shall be upon the party seeking to set aside any finding of the layout authority to show that such decision is unlawful or unreasonable. All findings of the layout authority upon all questions of fact properly before the court shall be prima facie lawful and reasonable. The decision appealed from shall not be set aside or vacated, except for errors of law, unless the court is persuaded by the balance of probabilities, on the evidence before it, that said finding is unreasonable or unlawful.
RSA 230-A:5
1991, 309:2, eff. Jan. 1, 1992.