Building Setback

Horizontal Distance Between Road Kerb and Receiver,m	Noise Level Correction dB(A)*
10	-0.3
20	-2.5
30	-4
40	-5.1
50	-6.0
60	-6.7
70	-7.4
80	-7.9
90	-8.4
100	-8.9

* Correction of nosie level for a nosie receiver at 5.5m high at different distance from the source.