One way coupling of CMAQ and a road source dispersion model for fine scale air pollution predictions

► We coupled the CMAQ and ADMS air quality models. ► We predicted hourly NOX, NO2 and O3 in London at 20 m × 20 m. ► Model evaluation has demonstrated reasonable agreement with 80 monitoring sites in London. ► Improvements are required in predicting the magnitude of road transport NOX emissions. ► The combination of regional and local scale models is a practical modelling tool.