CAR INTERNATIONAL - A SIMPLE-MODEL TO DETERMINE CITY STREET AIR-QUALITY

Based on wind tunnel experiments, theoretical considerations and measu rements, the dispersion model CAR (calculation of air pollution from r oad traffic) has been developed for determining air quality in city st reets. CAR International, which is a simple parameterized model using readily available input data, calculates annual percentile values and average concentrations close to streets (at the kerbside) for non-reac tive air pollutants and NO2. The accuracy of the model has proved to b e good and is within the limits set by Dutch air quality decrees. CAR International can be used for a quick survey of city street air qualit y. It is also a valuable tool for judging the effects of traffic manag ement plans and for scenario studies.