132003.221132 (23616DA) - Doonella Estate - Road Traffic Noise Assessment Report

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4 Road Traffic Noise Criteria

4.1 Noosa Shire Council

Noosa Shire Council (NSC) recognises the Queensland Department of Main Roads (QDMR) “Road
Traffic Noise Management: Code of Practice’ as the relevant traffic noise assessment policy.
Therefore the following road traffic noise criteria are applicable:

The Queensland Department of Main Roads (QDMR) "Road Traffic Noise Management: Code of
Practice” has provisions with respect to the category Bé ‘Proposed Residential Developments”. For
this scenario the QDMR recommend:

° the Lio (18 hour) should be equal to or less than 60 dB(A), where existing levels measured at
the local government deemed-to—comply dwelling setback distance are greater than 40 dB(A)
Ls0 (8 hour) between 10 pm and 6 am; or

° the Lio(I8 hour) should be equal to or less than 57 dB(A), where existing levels measured at
the local government deemed-to-comply dwelling setback distance are less than or equal to
40 dB(A) Loo (8 hour) between |0 pm and 6 am;

° where the above criteria cannot be met, internal maximum design levels specified in Table |,
AS2107 - 1987 and shown in Table 4.1 of this report.

The Queensland Department of Main Roads also recommends noise level limits for balconies and
formal open space. Formal external space is defined as the private or communal recreational area
“required” by a local government. For this scenario QDMR recommend:

° the Lio (18 hour) should be equal to or less than 60 dB(A), where existing levels measured at
the local government deemed—to—comply dwelling setback distance are greater than 45 dB(A)
Leo (18 hour) between 6 am and 10 pm; or

e the Lio(18 hour) should be equal to or less than 57 dB(A), where existing levels measured at
the local government deemed—to—comply dwelling setback distance are less than or equal to
45 dB(A) Lso (18 hour) between 6 am and 10 pm.

All external noise levels stated are free-field with the expectation that an additional 2.5 dB(A) increase
is applied for the facade correction when the building is constructed. This will achieve a level of equal
to or less than 63 dB(A) and 60 dB(A) respectively, | metre from the most exposed facade of a
building. . .

Australian Standard AS2107 — 1987 has been superseded by AS2107 -— 2000. The Queensland
Department of Main Roads (QDMR) “Road Traffic Noise Management: Code of Practice’’ has not
been revised to acknowledge the amendments to AS2107. Internal noise level limits from AS2107 -
2000 are shown in Table 4.1 as the most current criteria for habitable rooms. During the daytime,
AS2107 noise levels will apply to living areas and at night time AS2107 noise levels will apply to
sleeping areas. Daytime is taken to be 6am to |Opm and night time |Opm to 6am.

The Lio(18 hour) has been adopted by the QDMR to assess the impact of road traffic because it is
widely considered to have an adequate correlation with human response to road traffic noise. The
Lio(18 hour) noise level is the arithmetic average of 18 hourly Lio noise levels between the hours of

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