Computer noise modelling for Sydney's metropolitan railway guides prioritisation of noise mitigation works.
In the Sydney metropolitan area, many residential dwellings near railway corridors experience noise levels that exceed target levels. To reduce the impact of this railway noise over time, it is useful to identify the community areas with the highest noise exposure, both in terms of the noise levels and the number of people affected. Noise mitigation expenditure can thus be targeted at the most affected areas, maximising the overall benefit to the community.A study undertaken by Heggies on behalf of the Rail Infrastructure Corporation identified the localities experiencing the greatest noise impact from rail operations. This study involved computer noise modelling of 130km of rail corridor (477 track km) on five priority lines within the Sydney metropolitan area. In total, railway noise levels were calculated at over 20,000 residential dwellings.The study resulted in a five year prioritised programme of noise mitigation measures, which is currently being implemented.