Validation of calculation method of road traffic noise behind building complex in ASJ RTN-Model 2018 by field measurements

Road traffic noise calculation method behind the buildings included in the ASJ RTN-Model 2018 is an empirical model formula based on experimental results of a scale model. Therefore the scope of the calculation method is formally limited in terms of building height, density, and distance from the road, dependent on the range of experimental conditions. However the roadside conditions in Japanese urban and suburban areas are diverse and it is necessary to quantitatively investigate the validity of the calculation in such various conditions in order to widely expand the applicability of the calculation method. The authors have been studying an efficient estimation method of road traffic conditions in a viewpoint of noise emission from the roads. In order to create accurate noise maps, continuing from the study, an accurate estimation method of noise propagation in various build-up areas is expected. Therefore, in this study, we examine the validity of the road traffic noise calculation method in building complex by comparing the actual measurement results in some build-up areas around arterial roads.