23 C.F.R. Table 1 to Part 772—Noise Abatement Criteria
Title 23 - Highways
Title 23: Highways
PART 772—PROCEDURES FOR ABATEMENT OF HIGHWAY TRAFFIC NOISE AND CONSTRUCTION NOISE
Table 1 to Part 772—Noise Abatement Criteria
[Hourly A-Weighted Sound Level_decibels (dBA)\1\]---------------------------------------------------------------------------------------------------------------- Description of activity Activity Category Leq(h) L10(h) category----------------------------------------------------------------------------------------------------------------A................................. 57 (Exterior)........ 60 (Exterior)....... Lands on which serenity and quiet are of extraordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose.B................................. 67 (Exterior)........ 70 (Exterior)....... Picnic areas, recreation areas, playgrounds, active sports areas, parks, residences, motels, hotels, schools, churches, libraries, and hospitals.C................................. 72 (Exterior)........ 75 (Exterior)....... Developed lands, properties, or activities not included in Categories A or B above.D................................. ..................... .................... Undeveloped lands.E................................. 52 (Interior)........ 55 (Interior)....... Residences, motels, hotels, public meeting rooms, schools, churches, libraries, hospitals, and auditoriums.----------------------------------------------------------------------------------------------------------------\1\ Either L10(h) or Leq(h) (but not both) may be used on a project.
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