A holistic framework for assessing co-benefits of street-scale green infrastructure interventions

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A holistic framework for assessing co-benefits of street-scale green infrastructure interventions Core urban areas tend to bemade up of street canyons and are among the most polluted urban environments due to the restricted dispersion of trafficemissions by the surrounding buildings. The use of green infrastructure (GI) such as roadside hedges, trees, and greenwalls/roofs in urban areas can help to abate the exposure to traffic emissions and also offer many other co-benefitsincluding heat amelioration, noise reduction and increased biodiversity. However, all these benefits are very sensitive to thelocal context, and poorly planned GI can worsen situations or achieve limited co-benefits. Therefore, this project will use acombination of experiments, modelling and literature review to address the following questions: What are the trade-offsbetween pollution abatement and other co-benefits provided by GI (cooling, noise mitigation and biodiversity)? Arethere different trade-offs at different scales (street scale to city scale)?... Are these trade-offs completely context-specific,or can generalisable relationships be derived to help planners make the best use of GI? All the knowledge generatedthrough the answers to the above questions will be used to develop an easy to use evidence-based assessmentframework that helps to plan multiple co-benefits for small scale GI features, accounting for local contexts, which is sorelyneeded in urban area planning.