Guidelines for passive control of traffic-related air pollution in street canyons: An overview for urban planning

Recent studies indicate the necessity of addressing traffic-related air pollution in urban environments, as street canyons are known for their lack natural ventilation and increased levels. To address this issue, numerous have been conducted on different aspects (e.g. aspect ratio, orientation height variation) impact dispersion/dilution performance canyons. Despite studies, information remains fragmented results applications fairly unknown planning. Broad review canyon also quite scarce. In study, over 200 were collected reviewed across various parameters configuration levels (street / building in-canyon configuration). Hereby, study aims to give a comprehensive overview formulate spatial guidelines improve application purpose total, 19 general formulated, an implementation strategy planning was developed. usability these planning, high number limitations variabilities detected. The broad literature revealed knowledge gaps, indicating potentials further research.