20211104OBA_R2_Information_Request_Response - Acoustic RF · MCU21/0146

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[OCR of page images]
Furthermore, the Cardno Traffic Report presented a 0.8% annual growth for Noosa population, and due to
other intersection growths adopted a 1.5% annual growth for all intersection. Based on this, the future traffic
noise assessment (year 2031) increase relies on the following:

¢ A1.5% annual AADT increase for Hofmann Drive.
e An additional 42% increase due to the Noosa Civic expansion.

The numbers used in the assessment (year 2031) are provided in Table 12.

Table 12 - Hofmann Drive Traffic Volumes

 

 

 

Hofmann Drive
Road AADT Annual Increase Due to Predicted‘ | % Heavy
Speed Limit 2021 Growth* Noosa Civic AADT Vehicles
Expansion Compared 2031
to Year 2021°
50 km/h 5,000 1.5% 42% 7,903 2.0%

 

 

 

 

 

 

 

 

e Note“ Resulting in predicted addition of 803 vehicles in 2031 when compared to year 2021.

* Note®) This increase leads to additional 2,100 vehicles, or 1.5dB(A) noise increase.

e Note With the annual growth and extension increases combined, total additional 2,903 vehicles in
year 2031 is predicted compared to year 2021. This results in overall 60% traffic increase compared
to the 2021 traffic numbers used in acoustic modelling. Such increase would result in 1.7dB(A) noise
increase.

Based on the above information, 1.95dB(A) conservative year 2021 calibration model + 1.7dB(A) traffic flow
increase related noise change predicted for year 2031 would lead to 3.65dB(A) higher value in year 2031
than that monitored in year 2021.

5.1.3. Road Traffic Noise Model Year 2031

The SoundPLAN™ future road traffic noise model was based on CORTN modelling compared against the
measured noise levels presented in Table 5 and using the traffic volumes in Table 12. The results are
presented in Table 13.

Table 13 - Road traffic noise modelling calibration - Year 2031

 

Noise Level Lio, ishr dB(A)
Road Correction
Measured (2021) Model (2021) Model (2031)

Hoffman Drive 58.6 60.5 62.2 0

 

 

 

 

 

 

 

 

 

IMobs\2021\202 10208\20210208.3\20210923JJMA_R4_Development_Application_.docx 26