Street Tree Redevelopment in Rome’s Historical Landscapes: From Strategic Vision to Streetscape Design

Street trees play a fundamental role in shaping pedestrian sidewalks, squares, and small rest areas, enriching the public space, together with paving, street furniture, and lighting. However, the project of street tree lines along urban sidewalks remains an underestimated issue in urban design and strategic planning, even if it could be a pivotal opportunity for a widespread redevelopment of living streets and public spaces. The present study focuses on landscape aspects of the ‘street tree project’ intrinsically linked with the identity, perception, and morphological issues of urban spaces, from a strategic vision of the city to the human scale of the urban landscape. In this perspective, we discussed the case of Rome, Italy, where the historical heritage has had an extraordinary value, and where street trees are considered a notable contribution to the landscape identity of the whole city. The administrative council of the Municipality of Rome has initiated a comprehensive census of street trees and is currently developing a Street Tree Masterplan. This plan will serve as a guiding framework, outlining strategies for the conservation of arboreal heritage and the revitalization of the urban tree population along city streets. Based on the empirical evidence stemming from this case study, the discussion highlights the relevance of poorly debated issues, in both the academic and practitioner’s literature, mainly concerning the choice of urban trees’ species. Choosing the ‘right tree species in the right place’ has implications that are not only ecological and environmental, but also perceptive and architectural, being intimately associated with the urban scene and the identity of places.