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Air Rail Highway Bike/Ped Public Transit

Noise Analysis

environmentNew Hampshire has been evaluating the public impact of increased highway traffic noise since the development of the National Environmental Policy Act of 1969 (NEPA). The act required, among other aspects, evaluation of the impacts associated with improved and newly constructed roadways. The first noise abatement structure in New Hampshire was built in 1977 along Interstate 93 in Manchester. Since then numerous additional structures have been added throughout the state.

Abatement Eligibility
Noise abatement in New Hampshire is generally in the form of a sound barrier or berm. The locations of these barriers are identified using a specific set of criteria set forth by the NH Department of Transportation (NH DOT) and the Federal Highway Administration (FHWA). An area is not considered eligible for noise abatement unless it meets ALL of the criteria set forth in the Department's Noise Policy.

Additional Information:

Air Quality

Additional Information:

Contact:





New Hampshire Department of Transportation
PO Box 483 | 7 Hazen Drive | Concord, NH | 03302-0483
Tel: 603.271-3734 | Fax: 603.271.3914

copyright 2015. State of New Hampshire