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Road traffic noise predictions are routinely calculated as part of environmental impact studies that are in turn prepared to support the assessment of proposed infrastructure developments. These predictions are generally calculated using one of several predictive models worldwide which are based on differing theoretical and empirically derived algorithms of varying complexity. Each prediction model has typically been developed to reflect the range of road assets, vehicle fleet and specific legislative requirements of the country of origin. Although all road traffic noise prediction models appear to have been validated in their respective countries and deemed valid for their intended purposes, the limitations are not readily known and discrepancies between models are not well established. These uncertainties present a challenge for policy makers and practitioners who are looking to adopt a compatible and representative road traffic noise prediction model for the undertaking of environ-mental impact studies. In this work, the validity of UK’s Calculation of Road Traffic Noise is evaluated in countries other than where the road traffic noise prediction model was originally designed for. This review highlights some key considerations, limitations and pitfalls when choosing a predictive road traffic noise model developed offshore.
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