quality, as part of the larger research program of the University Sapienza “The city over the city.Urban regeneration processes and housing policies. Building up public-private relationship”, fundedin 20121. The work was developed through an initial analysis of the urban policies in some cities,identified as best practices, deployed on the theme of public space by some city governments inEurope (Copenhagen, Lyon, Barcelona, Saint Etienne), and a second step of comparative evaluationwith some programs (Punti Verde Qualità, Programma Urbano Parcheggi and Centopiazze) deployedin Rome in the 90s.The objective of this work was to verify: the methods, the procedures, the planning framework and instruments within these policies areimplemented, and the scale of intervention (from the widespread policies in large areas to thespecific interventions in the neighborhoods); the stakeholders, the methods of found finding and the public-private partnership; the procedures for the design control and management, implementation of the building andmaintenance phases of public space; the strengths and weaknesses of each program.The analysis results have been systematized, identifying exportables solutions and new, possible,operational references (guidelines) useful to overcome some of the problems detected in the case ofRome (marginal role of the public entity, absence of intervention quality controls, lack of guidelinesand design guidance, technical and organizational failure in the decentralized administrationstructure, etc.). The final work has provided a project experiment on one specific area in Rome:Mandrione, identified by the general planning instrument as project areas for public spaceenhancement (local centrality). On this area, has been proposed an intervention model whichsimulates the application of the identified guidelines, with the aim of suggest a possible virtuousprocess from of design and procedural point of view.