Appendix 3: Guidance on Evaluation of HGVs
Table A3.1: Change in BNL (Noise Level 10m from kerb) due to Changes in Road Traffic Speed and/or % HGV
| Modelled | Assumed |
|---|
Speed | 50 | 50 |
|---|
% HGV | 10 | 7.5 |
|---|
The Noise Level will Decreased by -0.6 dB(A
In Table A3.1 there is an embedded Excel spreadsheet that can be used to determine changes to the BNL due to changes in speed and/or % HGV. To use the spreadsheet simply double click inside the table. On doing so, the spreadsheet will open and you can input the modelled and assumed speeds and % HGVs. Then click outside the excel table and the phrase will update, indicating where there has been an increase, decrease or no change in the BNL. Any increases or decreases in the value of the BNL will be shown.