Appendix F- Acousitc Report · MCU21/0117.01

Cooroy Villas Pty Ltd
Environmental Traffic and Rail Noise Level Impact Assessment for Proposed Residential Unit Development,
54 Elm Street and 5 Pearl Street, Cooroy                                                                      Page 14 of 36



All of the above noise levels were free field with the microphone elevated 1.6 metres, at Monitoring
Location A, set back approximately 23 metres from the centre of Elm Street. The dominant ambient
noise source was traffic on Elm Street. Refer Figure 1 for details of Monitoring Location A.


Calculated Traffic Noise Levels

In accordance with CORTN88 and DTMR, current traffic noise levels (2021) for Elm Street have been
calculated.

From CORTN88, Table 2 details the calculated current (2021) traffic noise levels from Elm Street to
Monitoring Location A, with the receptor elevated 1.6 metres above the ground (same location as the
microphone). In accordance with DTMR traffic data the AADT number of vehicles on Elm Street for
2021 is 9779 vpd with 7.9% heavy vehicles at 60 kph. This is based on DTMR traffic data for Elm
Street at site 21130, which is the closest traffic data site to the monitoring location.


                                                     Table 2
    Calculated Current (2021) Traffic Noise Levels, Receptor 1.6 m high, at Monitoring Location A, Free Field

                                 Description                                     Traffic Noise Level, dB(A) LA10,18h

    Base traffic noise level, 9779 vpd, 9192 vp18h total                                          68.7
    7.9% CV @ 60 kph                                                                               0.5
    Road gradient (0%)                                                                              0
    Separation distance (23m)                                                                     -2.3
    Ground absorption                                                                             -2.4
    Road surface ((bituminous seal)                                                                1.0
    Qld conditions, free field                                                                    -0.7
    Barrier                                                                                         0
    Angle of view                                                                                 -4.1
    TOTAL:                                                                                        60.7


The measured value was 59.5 dB(A) LA10,18h, and the calculated value was 60.7 dB(A) LA10,18h, which is
a difference of +1.2 dB(A). A difference of up to 2 dB(A) between the measured and calculated values
is acceptable to the Department of Transport and Main Roads. As the calculated value was greater
than the measured value, the adopted current (2021) traffic noise level is 60.7 dB(A) LA10,18h.


Ultimate Traffic Noise Levels

In accordance with current data from the DTMR web site, the following should be noted for Elm Street in
close proximity to the subject site for 2021 (site 21130):

•      9779 vpd AADT;
•      7.9% CV @ 60 kph;
•      growth for 10-year horizon = 0.33%.




David Moore & Associates Pty Ltd                                          Our reference: R23089.docx/D3819/Rev.0/17.01.24