For all Type I and II projects, a highway agency shall:
(a) Identify land uses or activities that 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 that 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 costs of the abatement measures.
(c) Incorporate the needed abatement measures in the plans and specifications.
Sec. Table 1 to Part 772--Noise Abatement Criteria
[Hourly A-Weighted Sound Level--decibels (dB(A)) \1\]----------------------------------------------------------------------------------------------------------------
Activity Activity Criteria \2\
category Leq(h) L10(h) Evaluation location Activity description----------------------------------------------------------------------------------------------------------------A............... 57 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 \3\........... 67 70 Exterior............... Residential.C \3\........... 67 70 Exterior............... Active sport areas, amphitheaters,
auditoriums, campgrounds,
cemeteries, day care centers,
hospitals, libraries, medical
facilities, parks, picnic areas,
places of worship, playgrounds,
public meeting rooms, public or
nonprofit institutional structures,
radio studios, recording studios,
recreation areas, Section 4(f)
sites, schools, television studios,
trails, and trail crossings.D............... 52 55 Interior............... Auditoriums, day care centers,
hospitals, libraries, medical
facilities, places of worship,
public meeting rooms, public or
nonprofit institutional structures,
radio studios, recording studios,
schools, and television studios.E \3\........... 72 75 Exterior............... Hotels, motels, offices, restaurants/
bars, and other developed lands,
properties or activities not
included in A-D or F.F............... .............. .............. ....................... Agriculture, airports, bus yards,
emergency services, industrial,
logging, maintenance facilities,
manufacturing, mining, rail yards,
retail facilities, shipyards,
utilities (water resources, water
treatment, electrical), and
warehousing.G............... .............. .............. ....................... Undeveloped lands that are not
permitted.----------------------------------------------------------------------------------------------------------------\1\ Either Leq(h) or L10(h) (but not both) may be used on a project.\2\ The Leq(h) and L10(h) Activity Criteria values are for impact determination only, and are not design
standards for noise abatement measures.\3\ Includes undeveloped lands permitted for this activity category.