[Code of Federal Regulations]
[Title 23, Volume 1]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 23CFR772.19]

[Page 399-401]
 
                           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 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.

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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.


[[Page 401]]

 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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