Abstract
As a result of the New Zealand Government’s ‘Roads of National Significance’ programme, there has been a significant number of roading projects requiring large and complex traffic noise models to inform assessments of the potential impacts of traffic noise. For roading projects in built-up urban areas, screening by the front row of houses affects traffic noise levels at properties further away from the road. This paper explores different approaches to modelling the screening effects provided by these buildings using SoundPLAN and compares the results with measured noise levels.