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STATE HIGHWAYS

The state maintains 4,814 miles of roads, of which 2,567 miles are numbered routes and 1,465 miles are unnumbered roadways making up the State’s secondary roadway system. The state has 557 miles of primary roads, which it defines as roads which "connect population centers, other NHS routes within the state, and other NHS routes in the surrounding states: Vermont, Maine, and Massachusetts."


National Highway System

782 miles of the state maintained roads, are a part of the National Highway System (NHS). Of the NHS roads in the state, 225 miles are Interstate Highways (35 miles of which are also on the New Hampshire Turnpike System ; 52 miles of non-interstate Turnpike highways; and 505 miles of non-interstate and non-turnpike highways.


Non-state maintained roads

The remaining 12,215 miles of roads are maintained by other entities, mainly towns and cities.


CLASSIFICATION

New Hampshire RSA 229:5 Classification. sets out the seven different classes of highways in the state:
  • Class I – all portions of the turnpikes and the national system of interstate and defense highways, and all existing or proposed highways on the primary state highway system, excepting all portions of highways within the compact sections of the cities and towns listed in RSA 229:5, V., which aren't part of the state or national turnpike system or are defense highways

  • Class II – all existing or proposed highways on the secondary state highway system, excepting all portions of such highways within the compact sections of the cities and towns listed in RSA 229:5, V.

  • Class III – all recreational roads leading to, and within, state reservations designated by the General Court

  • Class III-a – boating access highways from any existing highway to any public water in this state.

  • Class IV – all highways within the compact sections of cities and towns listed in RSA 229:5, V., which are not Class I or II highways

  • Class V – all other traveled highways which a town has the duty to maintain regularly and shall be known as town roads

  • Class VI – all other existing public ways, including all highways discontinued as open highways and made subject to gates and bars, except Class III-a roads, and all highways which have not been maintained and repaired by the town for travel thereon for 5 or more successive years



RSA 229:5, V.

The Commissioner of Transportation may establish compact sections in the following cities and towns:


SEE ALSO