Approved report

4 C D Developments
Environmental Traffic and Rail Noise Level Impact Assessment for Proposed Residential Unit Development,
54 Elm Street and 5 Pearl Street, Cooroy                                                                     Page 16 of 35



                                                 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, 9591 vpd, 9016 vp18h total                                             68.7
5.51% CV @ 60 kph                                                                                -0.01
Road gradient (0%)                                                                                 0
Separation distance (23m)                                                                         -2.3
Ground absorption                                                                                 -2.4
Road surface                                                                                       0
Barrier                                                                                            0
Angle of view                                                                                     -4.1
TOTAL:                                                                                           59.9



The measured value was 59.5 dB(A) LA10,18h, and the calculated value was 59.9 dB(A) LA10,18h. 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 59.9 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 2019 (site 21130):

   9591 vpd AADT;
   5.51% CV @ 60 kph.

The estimated annual growth for Elm Street, in the vicinity of the subject site, is 3% and, therefore,
ultimate traffic volumes will be:

    2019        9591 vpd
    2020        9879 vpd
    2021        10175 vpd
    2022        10480 vpd
    2023        10794 vpd
    2024        11118 vpd
    2025        11452 vpd
    2026        11796 vpd
    2027        12150 vpd
    2028        12515 vpd
    2029        12890 vpd
    2030        13277 vpd
    2031        13675 vpd.

This increase in traffic volume will increase traffic noise levels (to 2031) as follows:

   (29.1 + 10 log10 13675) – (29.1 + 10 log10 10175) = 1.3 dB(A).

Therefore, for ultimate traffic volumes, traffic noise levels will be, at Monitoring Location A, at an
elevation of 1.6 m, 59.9 + 1.3 = 61.2 dB(A) LA10,18H, free field.



David Moore & Associates Pty Ltd                                                Our reference: R21046/D3569/Rev.0/2.07.21