20211104OBA_R2_Information_Request_Response - Acoustic RF · MCU21/0146

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[OCR of page images]
5 NOISE IMPACTS AND EMISSIONS

The proposed development is impacted by the following noise sources:
¢ Road traffic noise from Hofmann Drive.
¢ Mechanical plant noise from Noosa Civic Shopping Centre.
e Truck activities from Noosa Civic Shopping Centre loading dock.
5.1 ROAD TRAFFIC NOISE ASSESSMENT
5.1.1. Road Traffic Model Calibration (Year 2021)

Noosa Council traffic specialists have advised that there is limited information available for the existing
collector roads as well as the future Hoffman Drive extension. We note the following regarding the
calibration of 2021 road model:

e = The traffic consultant for the project (TTM Consulting) have advised ALC that the existing collector
road traffic information input relies on the currently posted speeds as well as up to 5,000 vehicles
per day (AADT). Our model calibration at the long term traffic noise monitoring location is based
on this information and heavy vehicle percentage of 2%;

e Posted speed limit of 50 km/h has been used in the road traffic noise model calculations.

The SoundPLAN model was calibrated based on the above numbers and the unattended road traffic noise
monitoring. The road traffic model calibration numbers are presented in Table 11.

Table 11 - Road traffic noise modelling calibration - Year 2021

 

Noise Level Lio, ish, dB(A)
Road Correction’
Measured Model Difference

 

 

Hoffman Drive 58.6 60.5 1.95 0

 

 

 

 

 

 

 

Note No correction was added to the model as the difference is within the acceptable 2dB(A) difference
validation range

Based on the above, we note that the traffic noise model is conservative when compared against the
measured value.

5.1.2 Traffic Numbers — Year 2031

The future (year 2031) traffic numbers have been based on Noosa Civic Expansion Traffic Impact Assessment
prepared by Cardno which noted an overall peak hour increase of 42% for Noosa Civic extension which
could result in 2,100 addition vehicles and a subsequent 1.5dB(A) noise increase compared to the 2021
model. Note, the distribution of traffic splits between surrounding roads. However, in the absence of exact
data we have applied such increase to the Hofmann Drive daily traffic rates as well.

I;Mobs\2021\202 10208\20210208.3\20210923JJMA_R4_Development_Application_.docx

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