Intervention:
Five poor quality studies investigated the effectiveness of three multicomponent built environment interventions. The studies investigated the effect of public transport route enhancement with improved walking and cycling links on active travel outcomes. Three of the studies evaluated the same intervention (the Cambridge guided busway; a dedicated bus-only route on a purpose built track) but at different time points and using different outcome measures. Although, the components of the interventions differed, all combined public transport improvements (such as train line extensions, new residential ‘TRAX’ stops or bus networks) with improved cycling and walking links (such as traffic-free walking and cycling routes, improved footpaths, and new bike lanes).
Evidence quality:
The majority of studies showed an effect in favour of the intervention for at least one measure of active travel; however, all the studies were rated as poor quality.
Generalisability:
Two studies took place in the USA, with the three examining the Cambridge guided busway taking place in the UK. Therefore, the interventions could be partially generalisable to Wales, but the contextual environment of the different countries should be considered.
If proceeding with this intervention:
It is suggested that further robust research and thorough evaluation of impact is needed.