Inderscience Publishers

WORM: A new open road line source model for low wind speed conditions

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Emission from road traffic constitutes one of the most important sources of air pollution in urban areas. This paper describes a newly developed air pollution dispersion model for open roads and highways called WORM (Weak Wind Open Road Model), and give some results using this model at Nordbysletta, Norway, in the period 1 January 200215 April 2002. Generally, a good correspondence was found between observed and model–predicted concentrations of nitrogen oxides (NOx), even in periods with low wind speed and (strongly) stable atmospheric conditions.

Keywords: open road, highways, integrated Gaussian dispersion, low wind speed, stable conditions, traffic turbulence, dispersion modelling, air quality, air pollution, traffic emissions, urban areas, Norway, nitrogen oxides, NOx

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