What are the Impacts on Air Quality of Low Emission Zones in Denmark?

An evaluation and quantification of the effects for emissions and air quality of introduction of low emission zones in Denmark have been performed using a combination of air quality measurements, dispersion modelling and registration of vehicle number plates. An analysis of measurements of air quality at H.C. Andersens Boulevard in Copenhagen before and after introduction of the low emission zone has been carried out to isolate the effect of the low emission zone. Measurements at selected street and urban background stations have been used to evaluate the performance of the air quality models applied for assessment of the impacts of the low emission zones in selected streets in Copenhagen, Aarhus, Odense and Aalborg. Video recording of vehicle number plates at the street of Åboulevard in Copenhagen was carried out for long periods in 2008/09 and 2010/11, and the number plate information is coupled to the vehicle information from the Central Registry of Motor Vehicles. This method allows for evaluation of how the requirements of the low emission zones influence the distribution of Euro emission classes of affected heavy-duty vehicles and hence the vehicle emission.

本研究结合空气质量实测、大气扩散模拟与车牌登记数据，对丹麦低排放区（low emission zones）实施后对排放与空气质量的影响开展了评估与量化分析。针对哥本哈根汉斯·克里斯蒂安·安徒生大道（H.C. Andersens Boulevard）的空气质量监测数据，本研究开展了低排放区实施前后的对比分析，以剥离低排放区的单独影响效应。选取哥本哈根、奥胡斯、欧登塞及奥尔堡的选定街道与城市背景监测站的实测数据，对用于评估上述城市选定街道低排放区影响的空气质量模型性能进行了校验。哥本哈根Å布勒大道（Åboulevard）的车牌视频监测工作于2008/2009年与2010/2011年分两阶段长期开展，所获车牌信息已与机动车中央登记系统的车辆信息完成关联匹配。该方法可用于评估低排放区的准入要求如何影响受管控重型车辆的欧标排放等级分布，进而揭示其对车辆排放水平的影响。