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Development of an open-source road traffic noise model for exposure assessment

Lookup NU author(s): Professor Margaret Carol Bell CBE, Dr Paul Goodman



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


This paper describes the development of a model for assessing TRAffic Noise EXposure (TRANEX) in an open-source geographic information system. Instead of using proprietary software we developed our own model for two main reasons: 1) so that the treatment of source geometry, traffic information (flows/speeds/spatially varying diurnal traffic profiles) and receptors matched as closely as possible to that of the air pollution modelling being undertaken in the TRAFFIC project, and 2) to optimize model performance for practical reasons of needing to implement a noise model with detailed source geometry, over a large geographical area, to produce noise estimates at up to several million address locations, with limited computing resources. To evaluate TRANEX, noise estimates were compared with noise measurements made in the British cities of Leicester and Norwich. High correlation was seen between modelled and measured LAeq,1hr (Norwich: r = 0.85, p = .000; Leicester: r = 0.95, p = .000) with average model errors of 3.1 dB. TRANEX was used to estimate noise exposures (LAeq,1hr, LAeq,16hr, Lnight) for the resident population of London (2003–2010). Results suggest that 1.03 million (12%) people are exposed to daytime road traffic noise levels ≥ 65 dB(A) and 1.63 million (19%) people are exposed to night-time road traffic noise levels ≥ 55 dB(A). Differences in noise levels between 2010 and 2003 were on average relatively small: 0.25 dB (standard deviation: 0.89) and 0.26 dB (standard deviation: 0.87) for LAeq,16hr and Lnight.

Publication metadata

Author(s): Gulliver J, Morley D, Vienneau D, Fabbri F, Bell MC, Goodman P, Beevers S, Dajnak D, Kelly FJ, Fecht D

Publication type: Article

Publication status: Published

Journal: Environmental Modelling & Software

Year: 2015

Volume: 74

Pages: 183-193

Print publication date: 01/12/2015

Online publication date: 08/01/2015

Acceptance date: 21/12/2014

Date deposited: 21/09/2015

ISSN (print): 1364-8152

ISSN (electronic): 1873-6726

Publisher: Pergamon Press


DOI: 10.1016/j.envsoft.2014.12.022


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Funder referenceFunder name
NE/I00789X/1NERC (Environmental Exposures and Health Initiative: EEHI)