ACCURACY IMPLICATIONS OF USING THE WG-AEN GOOD PRACTICE GUIDE TOOLKITS

In support of the WG-AEN, DEFRA has recently commissioned a research project to further extend the range of available Toolkits within the forthcoming Version 2 of the Good Practice Guide. The study have developed six additional Toolkits, and carried out Monte Carlo simulations, alongside mapping based sensitivity tests, in order to propose quantified decibel accuracy indicators in place of the original symbols. This paper sets out an overview of the purpose and design of the proposed new GPG Toolkits, as well as presenting the quantified accuracy indicators and extended practical guidance for noise mapping practitioners. The paper will focus on the practical outcomes of the research project in order to inform competent authorities on how the work may be used to deliver cost effective, quality controlled, environmental noise maps to meet the requirements set by the European Noise Directive.