4. Discussion
To approach the ideal of livable cities, planners and decision
makers need to be informed about both ES and ED associated with
the urban green infrastructure (Elmqvist et al., 2013; Gaston et al.,
2013). Our review illustrates a broad range of ES that can be
delivered by roadside vegetation and help mitigate environmental
pressures, which is specifically relevant for socioeconomically
disadvantaged groups with limited access to parks or gardens
(Kirkpatrick et al., 2011). The results summarized in Table 1
represent a first integrative synthesis because existing studies
mainly address individual ES and are broadly scattered in papers
from the natural and social sciences.