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 18 of 35



For the facades of the residential units at right angles to Elm Street, the ultimate facade corrected traffic
noise level at the junction of Unit 9 and 10 will be as per Table 5.


                                                  Table 5
Calculated Ultimate (2031) Traffic Noise Level at Facade at the Junction of Units 9 and 10, Receptor 1.6 m
                                          high, Facade Corrected

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

Base traffic noise level, 13675 vpd, 12855 vp18h total                                           70.2
5.51% CV @ 60 kph                                                                                -0.01
Road gradient (0%)                                                                                 0
Separation distance (34.3m)                                                                       -4.1
Ground absorption                                                                                 -3.8
Façade correction                                                                                +2.5
Road surface                                                                                       0
Barrier                                                                                            0
Angle of view (600)                                                                               -4.8
TOTAL:                                                                                           60.0


Based on the findings of Tables 3, 4 and 5 an acoustic barrier is required to provide traffic noise control
to the Level 1 facades of Units 10 and 11 only.

By path difference calculation a 1.5 metre high acoustic barrier will reduce traffic noise levels according
to Table 6.


                                                   Table 6
 Calculated Ultimate (2031) Traffic Noise Level at Closest Facade of Unit 11, Receptor 1.8 m high, Facade
                                     Corrected, With Acoustic Barrier

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

Base traffic noise level, 13675 vpd, 12855 vp18h total                                           70.2
5.51% CV @ 60 kph                                                                                -0.01
Road gradient (0%)                                                                                 0
Separation distance (20.3m)                                                                       -1.8
Ground absorption                                                                                  0
Façade correction                                                                                +2.5
Road surface                                                                                       0
Barrier (2.4m high)                                                                               -9.8
Angle of view (1400)                                                                              -1.1
TOTAL:                                                                                           60.0




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