Attachment 8 - Environmental Noise Assessment · MCU23/0078

7              Analysis - Road Traffic Noise
An assessment of road traffic noise onto the proposed development was conducted to determine the
acoustic treatment requirements for predicted compliance with the relevant criteria.

7.1          Traffic Volumes
Traffic volumes and growth rates were obtained from the SLR Consulting. The traffic volumes used in the
assessment are presented in Table 20. These traffic volumes were used to determine the increase in road
traffic noise over the 10 year planning horizon to be applied to the measured noise levels. Heavy vehicle rate
was obtained from Queensland Government Traffic Data 2019 traffic.
Table 20: Traffic Volumes used in the Assessment

                                                Traffic Volumes (AADT)                      Growth             % Heavy
   Road
                                        2022              2023                 2033         Rate (%)           Vehicles

   Walter Hay Drive                    18,492            18,640             25,202            0.8%              8.8%



The 18 hour traffic volumes used in the noise model are taken to be 95% of the AADT (Annual Average Daily
Traffic).

7.2          Noise Model
7.2.1        Noise Modelling Parameters
Road traffic noise predictions were conducted using ‘SoundPLAN v9.0’, a CoRTN based modelling program.
The basis of the ‘SoundPLAN’ model is presented in Table 21.

Table 21: Noise Modelling Parameters

   Description                                                    Value
   Noise modelling standard                                       CoRTN (UK)
   Grid spacing (noise maps)                                      2m
   Road surface type                                              Impervious (+1.5 dB(A))
   CoRTN correction for QLD roads                                 -0.7dB(A) (free-field)
   (Except Pacific Motorway between Logan Motorway to Nerang)     -1.7dB(A) (1m in front of building façade)
   Ground contours                                                Queensland Lidar data - 1m DEM
   Walter Hay Drive Speed limit                                   70 km/h
   Noise source height above grade                                0.5m
   Floor heights                                                  2.8m
   Receiver heights                                               1.8m above ground level
   Façade correction                                              +2.5 dB(A)




Site: Eenie Creek Road, Noosaville                                                                                        30
Reference: 22BRA0078 R01_4