23 C.F.R. § 772.11 Noise abatement.
Title 23 - Highways
(a) In determining and abating traffic noise impacts, primary consideration is to be given to exterior areas. Abatement will usually be necessary only where frequent human use occurs and a lowered noise level would be of benefit. (b) In those situations where there are no exterior activities to be affected by the traffic noise, or where the exterior activities are far from or physically shielded from the roadway in a manner that prevents an impact on exterior activities, the interior criterion shall be used as the basis of determining noise impacts. (c) If a noise impact is identified, the abatement measures listed in §772.13(c) of this chapter must be considered. (d) When noise abatement measures are being considered, every reasonable effort shall be made to obtain substantial noise reductions. (e) Before adoption of a final environmental impact statement or finding of no significant impact, the highway agency shall identify: (1) Noise abatement measures which are reasonable and feasible and which are likely to be incorporated in the project, and (2) Noise impacts for which no apparent solution is available. (f) The views of the impacted residents will be a major consideration in reaching a decision on the reasonableness of abatement measures to be provided. (g) The plans and specifications will not be approved by FHWA unless those noise abatement measures which are reasonable and feasible are incorporated into the plans and specifications to reduce or eliminate the noise impact on existing activities, developed lands, or undeveloped lands for which development is planned, designed, and programmed.
Title 23: Highways
PART 772—PROCEDURES FOR ABATEMENT OF HIGHWAY TRAFFIC NOISE AND CONSTRUCTION NOISE
§ 772.11 Noise abatement.
