F3 Freeway Noise Assessment Supplementary Noise ... - RTA
F3 Freeway Noise Assessment Supplementary Noise ... - RTA
F3 Freeway Noise Assessment Supplementary Noise ... - RTA
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<strong>Noise</strong> <strong>Assessment</strong><br />
<strong>Supplementary</strong> <strong>Noise</strong> <strong>Assessment</strong> for<br />
Proposed widening of the <strong>F3</strong> freeway between Mt Colah and Cowan<br />
<strong>RTA</strong> Operations and Services<br />
Hunter Region<br />
July 2006
Document Controls<br />
Business Unit<br />
Document description<br />
Environmental Technology Branch<br />
<strong>Supplementary</strong> <strong>Noise</strong> <strong>Assessment</strong>: <strong>F3</strong> Widening<br />
Between Wahroonga and Hawkesbury River<br />
Status<br />
Date<br />
Final 26/7/2006<br />
<strong>RTA</strong>/Pub. 06.389<br />
ISBN 978-1-921474-91-0<br />
© Roads and Traffic Authority<br />
Prepared by <strong>RTA</strong> Operations – Environmental Technology Branch<br />
<strong>RTA</strong> Operations Directorate<br />
AS/NZS ISO 9001<br />
QEC 7443<br />
Standards Australia
<strong>Supplementary</strong> <strong>Noise</strong> <strong>Assessment</strong><br />
<strong>F3</strong> Widening Between Wahroonga and Hawkesbury River<br />
1.0 INTRODUCTION<br />
The NSW Roads and Traffic Authority’s Environmental Technology Branch (Monitoring) was<br />
requested to provide an additional supplementary noise report to the noise assessment included<br />
in the Review of Environmental Factors (REF) for the proposed widening of the current<br />
carriageways of the <strong>F3</strong> <strong>Freeway</strong> between Wahroonga and Cowan as a result of the comments<br />
received from the community following public display of the REF titled “Cowan to Mt Colah –<br />
Proposed Widening of the <strong>F3</strong> <strong>Freeway</strong>” dated April 2006.<br />
Additional noise monitoring was requested for residences at the following locations:<br />
• 1/2, 7, and 8 Flanders Avenue, Mt Kuring-gai;<br />
• 3C Alicia Road, Mt Kuring-gai<br />
• 902, 904, 906 and 908 Pacific Highway, Berowra<br />
• 18 Bayview Street, Mt Kuring-gai<br />
• Mt Kuring-gai Public School (internal classroom measurements)<br />
With the exception of the school, measurements were taken by placing each noise logger 1<br />
metre away from the closest façade of their respective residence facing the road over seven<br />
whole days with the microphone height set at 1.5 metres. Two classrooms considered to be<br />
the closest to the <strong>F3</strong> <strong>Freeway</strong> were chosen and indoor measurements were recorded during<br />
the morning peak hour period with the microphone height also set at 1.5 metres placed in the<br />
centre of each classroom. This report is to be used in conjunction with the noise assessment<br />
already undertaken for the REF and provides noise measurements and conclusions only.<br />
2.0 MEASUREMENT RESULTS<br />
Table 1 contains a summary of the noise levels recorded from the long-term noise loggers<br />
between Friday 9 th June and Friday 16 th June 2006 and the short-term measurements taken on<br />
19 th and 20 th June 2006. Meteorological conditions during the measurement periods were<br />
generally fine.<br />
Table 1<br />
Summary of Existing Traffic <strong>Noise</strong> Level for Nominated Residences.<br />
TRAFFIC NOISE LEVEL dB(A)<br />
Site Location<br />
Day<br />
Night<br />
LAeq (15 hr)<br />
LAeq (9 hr)<br />
1/2 Flanders Avenue Mt Kuring-gai 66 63<br />
3C Alicia Road Mt Kuring-gai 60 57<br />
904 Pacific Highway Berowra 62 55<br />
18 Bayview Street Mt Kuring-gai 62 59<br />
902 Pacific Highway Berowra 62 56<br />
906 Pacific Highway Berowra 58 52<br />
908 Pacific Highway Berowra 55 49<br />
7 Flanders Avenue Mt Kuring-gai 61 58<br />
8 Flanders Avenue Mt Kuring-gai 64 62<br />
EPA Criteria 60 55<br />
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<strong>Supplementary</strong> <strong>Noise</strong> <strong>Assessment</strong><br />
<strong>F3</strong> Widening Between Wahroonga and Hawkesbury River<br />
The traffic noise level recorded at Mount Kuring-gai Public School in both classrooms 5 & 6 was<br />
LAeq, 1hr = 39 dB(A). This currently satisfies the noise criterion of LAeq, 1hr = 45 dB(A) for existing<br />
schools affected by noise from proposed roads outlined in Department of Environment and<br />
Conservation’s (DEC) “Environmental Criteria for Road Traffic <strong>Noise</strong>” (ECRTN, May 1999),<br />
which represents the NSW State Government’s current policy on road traffic noise.<br />
As calculated from the noise assessment included in the REF, noise levels for the existing<br />
alignment in 2007 would be the same as the existing traffic noise level in 2006. Taking into<br />
consideration the traffic volume increase and the increase in percentage of heavy vehicles over<br />
10 years, an overall increase of 2 dB(A) for the daytime and 2 dB(A) increase for the night time<br />
period would be expected. Tables 2 and 3 include predicted traffic noise levels for the<br />
residential dwellings for the future existing alignment (predicted 2007 noise level if the project<br />
were not to proceed) and the proposed alignment in the design year 2017.<br />
Table 2<br />
Summary of Daytime Traffic <strong>Noise</strong> Levels for Residences in the<br />
Vicinity of the Proposal (Existing 2007 and Proposed Alignment 2017).<br />
SITE<br />
LOCATION<br />
2007<br />
Existing<br />
alignment<br />
TRAFFIC NOISE LEVEL Leq, 15 hour [dB(A)]<br />
DOES IT<br />
2017<br />
DOES IT<br />
EXCEED<br />
EXCEED<br />
Proposed BASE<br />
ALLOWANCE<br />
alignment NOISE<br />
NOISE GOAL<br />
GOALS<br />
ACUTE *<br />
1/2 Flanders Ave Mt Kuring-gai 66 68 Yes No Yes<br />
3C Alicia Rd Mt Kuring-gai 60 62 Yes No No<br />
904 Pacific H/wy Berowra 62 64 Yes No No<br />
18 Bayview St Mt Kuring-gai 62 64 Yes No No<br />
902 Pacific H/wy Berowra 62 64 Yes No No<br />
906 Pacific H/wy Berowra 58 60 No N/A No<br />
908 Pacific H/wy Berowra 55 57 No N/A No<br />
7 Flanders Ave Mt Kuring-gai 61 63 Yes No No<br />
8 Flanders Ave Mt Kuring-gai 64 66 Yes No Yes<br />
* Acute noise level is traffic noise being equal to or greater than 65 dB(A) for the daytime period.<br />
Table 3<br />
Summary of Night Time Traffic <strong>Noise</strong> Levels for Residences in the<br />
Vicinity of the Proposal (Existing 2007 and Proposed Alignment 2017).<br />
SITE<br />
LOCATION<br />
2007<br />
Existing<br />
alignment<br />
TRAFFIC NOISE LEVEL Leq, 9 hour [dB(A)]<br />
DOES IT<br />
2017<br />
DOES IT<br />
EXCEED<br />
EXCEED<br />
Proposed BASE<br />
ALLOWANCE<br />
alignment NOISE<br />
NOISE GOAL<br />
GOALS<br />
ACUTE *<br />
1/2 Flanders Ave Mt Kuring-gai 63 65 Yes No Yes<br />
3C Alicia Rd Mt Kuring-gai 57 59 Yes No No<br />
904 Pacific H/wy Berowra 55 57 Yes No No<br />
18 Bayview St Mt Kuring-gai 59 61 Yes No Yes<br />
902 Pacific H/wy Berowra 56 58 Yes No No<br />
906 Pacific H/wy Berowra 52 54 No N/A No<br />
908 Pacific H/wy Berowra 49 51 No N/A No<br />
7 Flanders Ave Mt Kuring-gai 57 59 Yes No No<br />
8 Flanders Ave Mt Kuring-gai 62 64 Yes No Yes<br />
* Acute noise level is traffic noise being equal to or greater than 60 dB(A) for the night time period.<br />
Based on the overall increase of 2 dB(A) expected for the design year 2107, the traffic noise<br />
level at Mount Kuring-gai Public School in both classrooms 5 & 6 would be LAeq, 1hr = 41 dB(A).<br />
This also would satisfy the noise criterion of LAeq, 1hr = 45 dB(A) as outlined in ECRTN.<br />
Page 4
<strong>Supplementary</strong> <strong>Noise</strong> <strong>Assessment</strong><br />
<strong>F3</strong> Widening Between Wahroonga and Hawkesbury River<br />
3.0 SUMMARY<br />
3C Alicia Road Mount Kuring-gai<br />
No mitigation measures would be required for this residence as noise levels would be within<br />
allowance goals.<br />
Flanders Avenue Mount Kuring-gai<br />
The predicted traffic noise level at 7 Flanders Avenue Mount Kuring-gai would satisfy the<br />
allowance noise goals and therefore, no mitigation measures would be required for this<br />
residence.<br />
Existing noise levels would become acute for residences 1/2, 2/2, 1/4, 2/4, 6 and 8 Flanders<br />
Avenue Mt Kuring-gai in the design year 2017 (acute noise levels defined as LAeq, 15hrs greater<br />
than or equal to 65 dBA for daytime and LAeq, 9hrs greater than or equal to 60 dBA) resulting in<br />
the consideration of mitigation measures where feasible and reasonable. The existing noise wall<br />
does not extend past these residences as the noise wall was built prior to the construction of<br />
these dwellings. If mitigation measures in the form of a noise wall were to be considered,<br />
the existing 4 metres high noise wall would need to be extended by 350 metres to cater for the<br />
affected residences at Flanders Avenue. Based on a typical pricing for a timber noise wall of<br />
$500/sq metre, the cost for this noise wall extension would be around $700,000. However if<br />
mitigation measures in the form of architectural treatments were considered, then 6 residences<br />
at $15,000 each would cost around $90,000.<br />
18 Bayview Street Mount Kuring-gai<br />
This residence does not currently experience acute noise levels but night time noise levels<br />
would become acute in the design year 2017. However, it would not be feasible or reasonable<br />
to provide further mitigation measures as the increase of 2 dB(A) would be barely perceivable<br />
and the existing noise wall is already providing noise attenuation from the <strong>F3</strong> freeway.<br />
902-908 Pacific Highway Berowra<br />
<strong>Noise</strong> levels satisfy allowance noise goals and therefore no mitigation measures are required.<br />
Mt Kuring-gai Public School<br />
Internal noise levels measured at morning peak hour in Classroom 5 and Classroom 6 are well<br />
below criteria of Leq,1hr=45 dB(A), therefore no mitigation measures required.<br />
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