Noise Report [As Published] · 132007.2398

RSL Care ==

Proposed RSL Retirement Village, Cooroy — Road and Rail Noise Assessment >=

 

4 ROAD TRAFFIC NOISE ASSESSMENT

41 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 calculation. 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 Lajo,18 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.

4.2 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 as shown on Figure 2. Receptors
were placed at worst-case locations for the ILU lots and other proposed buildings (village
centre, care facility and two-storey apartments). A total of 101 receptors have been modelled.

4.3 TRAFFIC DATA

The Queensland Department of Main Roads has provided 2006 traffic data for the Cooroy
Connection Road, north of Pearsons Road. The 2005-2006 growth rate for the Cooroy
Connection Road is 5.35 %. This growth rate has been applied to predict 2007 and 2018
AADT counts. Table 4.1 presents a summary of the traffic data used for the assessment.

TABLE 4.1: AADT DAILY PREDICTED TRAFFIC VOLUMES

 

 

 

 

 

 

 

Year Cooroy Connection Road

% Heavy Vehicles AADT
2006 10 6,180
2007 10 6,511
2018 10 11,554

 

 

 

 

AIR NOISE ENVIRONMENT PTY LTD
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