Dispersion modelling can help assess how road traffic emissions may affect air quality around a proposed development. Two commonly used approaches are DMRB screening and ADMS-Roads. DMRB screening provides a proportionate method for assessing potential impacts from road traffic and is often suitable for straightforward schemes where a detailed model is not necessary.
ADMS-Roads is a more advanced dispersion modelling system that can represent complex road networks, traffic conditions, emissions, terrain, and meteorological factors in greater detail. Choosing between the two depends on the scale and complexity of the development, the sensitivity of nearby receptors, and the requirements of the local planning authority.
Understanding the differences early can help developers and planning consultants select an appropriate methodology, avoid unnecessary modelling costs, and provide robust evidence to support a planning application.
