Application of urban street canyon models for predicting vehicular pollution in an urban area in Dublin, Ireland

The relative performance of two atmospheric dispersion models STREET and OSPM is assessed using measured CO and NOx data obtained adjacent to an urban street canyon. This paper in particular, evaluates the performance of STREET, a mathematical model, to determine its suitability as an alternative to the OSPM model, which is a more elaborate numerical model. The performances of the models are tested using composite emission factors calculated as per the speed conditions present on the study site. Two different versions of CEF were used depending upon the speed of the vehicles during daytime and nighttime.