07/2398 - Revised Noise Report and cover letters to referral agencies [As Published] · 132007.2398

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RSL Care ==
Proposed RSL Retirement Village, Cooroy - Road and Rail Noise Assessment (Revised)

 

5 ROAD TRAFFIC NOISE ASSESSMENT
5.1. NOISE PREDICTION METHODOLOGY

The methodology adopted for the assessment is as required by the Queensland Department of
Main Roads (2000) guideline, Road Traffic Noise Management: Code of Practice. As detailed in
this procedure, predictions for a 10 year traffic horizon from the proposed completion date of the
expansion project were undertaken. For the purposes of the assessment predictions were
undertaken in accordance with the methodology described in the United Kingdom, Department of
Transport (1988) procedure, Calculation of Road Traffic Noise (CORTN 88).

The noise predictions for the proposed development were completed using the proprietary software
package Cadnaa (Computer Aided Noise Abatement Model), developed by DataKustik. The noise
modelling involved prediction of potential receptor noise levels at the proposed development
utilising the CoRTN method of catculation. The methodology gives consideration to various
elements of the road design including traffic flows, traffic vehicle composition, road gradient,
acoustic shielding by other buildings, and road surface type. The method predicts Lato,1s nour NOISE
levels which are the noise levels exceeded 10 % of the time between the hours of 6 am and
midnight.

The road surface type utilised in the predictions was a 10 mm chip seal (3.0 dB(A) correction) for
the Cooroy Connection Road. A photograph showing the road surface is presented on Plate 2 in
Appendix C.

§.2. POTENTIALLY IMPACTED RECEPTORS

Hypothetical receptor positions with a potential to be impacted by noise from road traffic were
selected from current plans of the proposed development. Receptors were placed at worst-case
locations for all buildings. Receptor positions are summarised as follows:

= 5 worst-case receptor positions for each ILU were selected to represent various facades:
«® Bedroom 1;

Bedroom 2;

Sliding Door opening to Terrace;

Side facade of ILU enclosing the Living/Dining and Kitchen Areas; and

Front facade of ILU enclosing the Living Area.

« 4 worst-case receptor positions (South-East, South-West, North-East and North-West wing) for
the Aged Care Facility at ground and first floor levels;

= 1 worst-case receptor position for the 20 Unit Apartment at ground and first floor; and
® 1 worst-case receptor position for the Community Village building.

Figure 7 presents the ILU building numbers considered in the noise modelling and receptor
positions all other buildings.

 

AIR NOISE ENVIRONMENT PTY LTD
INETWORK/PROJECTS/M1750/REPORTING/2008 REVISION/1750REPORT04.ODT Page 15