RFI - 7. Accoustic

7. Road Traffic Assessment
Road traffic noise associated with the surrounding road network was assessed at the development
over a ten-year planning horizon.


7.1   Traffic Volumes
Road traffic volumes were conservatively predicted using the measured Road Traffic Noise due to
the unavailability of road traffic data for Noosa Drive. Other road traffic data (heavy vehicle
percentage and associated 10-year horizon growth rate) were conservatively assumed based on
similar projects completed by Acoustic Works.

Road traffic data is provided in Table 6.

                                             Table 6: Traffic Volumes

                                   2023               2033
                                                                        Percentage of
            Location             Predicted          Predicted                             Growth Rate
                                                                        Heavy Vehicles
                                   AADT               AADT
           Noosa Drive            12, 632            15, 398                   3.0%              2%


7.2   Road Traffic Noise Verification
To ensure the CoRTN noise model is accurate, a verification model of the predicted LA10(18hr) was
created and compared to the measured noise level. The CoRTN method allows a 2dB(A) variation
from the predicted and measured level, if the variation exceeds 2dB(A) a correction to the predicted
level is required.
                            Table 7: Comparison of measured and predicted noise levels
                                      Measured LA10(18hr)       Predicted LA10(18hr)
                 Location                                                                Correction
                                           dB(A)                      dB(A)
             Oakey Flat Road                  64                        64.6                 0




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