were modelled in the SoundPLAN noise modelling software, which implements accepted national and international acoustic calculation standards, including specifically CRTN and International Standard ISO9613. The incorporated calculation algorithm described in ISO9613 was used in this assessment for calculating noise propagation at noise sensitive locations in close proximity to designated construction haul routes. The calculation method takes account of air absorption, distance attenuation, barriers and topography, and light downwind conditions from source to receptor.


49.


Table 26.8 presents the 18-hour Annual Average Weekday Traffic (AAWT) data for the roads used during construction programme; data were sourced fromChapter 27 Traffic and Transport and utilising the same road classification.


Table 26.8


Road Link ID numb er 1


2 3 4 5


6 7


8 9 AAWT traffic data used for the construction traffic noise assessment (see Chapter 27 Traffic and Transport)


Road Link ID Number & name


A14 between the J51 and J52


A14 between the J52 and J53


A1156 south from J53


A14 between the J53 and J55


A12 south from J55


Paper Mill Lane


B1113


A14 between the J55 and J56


A14 between the J56 and J58


Preliminary Environmental Information May 2014


2018 Baseline flows AAWT


Total Vehicles


57,376 63,085 21,093 54,349 50,100


1,981 5,485


62,497 46,739


Total HGVs


5,973 7,980 447 7,537 5,905


327 669


9,041 6,727


2018 Baseline + Scenario 1


Total Vehicles


57,573 63,413 21,202 54,614 50,472


2,220 5,662


62,857 47,101


Total HGVs


6,129 8,250 519 7,768 6,217


554 758


9,357 7,042


2018 Baseline + Scenario 2


Total Vehicles


57,839 63,848 21,305 54,989 50,973


2,621 5,910


63,306 47,554


Total HGVs


6,339 8,605 572 8,096 6,637


907 918


9,751 7,436


East Anglia THREE Offshore Windfarm


Chapter 26 Noise and Vibration Page 16


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