[Code of Federal Regulations]
[Title 23, Volume 1]
[Revised as of April 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 23CFR772.19]
[Page 393-394]
TITLE 23--HIGHWAYS
CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 772--PROCEDURES FOR ABATEMENT OF HIGHWAY TRAFFIC NOISE AND CONSTRUCTION NOISE--Table of Contents
Sec. 772.19 Construction noise.
The following general steps are to be performed for all Types I and
II projects:
(a) Identify land uses or activities which may be affected by noise
from construction of the project. The identification is to be performed
during the project development studies.
(b) Determine the measures which are needed in the plans and
specifications to minimize or eliminate adverse construction noise
impacts to the community. This determination shall include a weighing of
the benefits achieved and the overall adverse social, economic and
environmental effects and the costs of the abatement measures.
(c) Incorporate the needed abatement measures in the plans and
specifications.
Table 1--Noise Abatement Criteria
[Hourly A-Weighted Sound Level--decibels (dBA)\1\]
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Description of activity
Activity Category Leq(h) L10(h) category
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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.
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\1\ Either L10(h) or Leq(h) (but not both) may be used on a project.
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Appendix A to Part 772--National Reference Energy Mean
Emission Levels as a Function of Speed
[GRAPHIC] [TIFF OMITTED] TC14OC91.013
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