## 7 Conclusions  
The planning of the renovations of street light infrastructures in urban areas should take into consideration several parameters. The level of light in urban areas cannot be arbitrarily high due to economical as well as environmental (energy consumption and light pollution) reasons. At the same time, the level, and the quality, of light is strictly correlated with the perceived level of security of the citizen. The research work proposed a methodology for the planning of light renovations based on the correlation of GIS data from different sources. The map of the quality of the street light in the different urban areas is correlated with other GIS data, which can be considered quantitative indexes of the perceived level of security. In particular, in the current research the number and geographical distribution of road accidents was considered an example of metrics to be used to validate the proposed approach. The publicly available road accident data of the Milan area has been analyzed. It is possible to underline as a further step of the research that it will be enriched with the road accidents data that will allow a significant comparison with drivers' difficulties in the tested area of the city located in Zone 9 which is the most subject to car accidents. The idea is to extend the indicators (the hard KPI) with the crowdsourcing data about perceived safety from the citizens (soft KPI) which can compose a structured proposal for implementing the lighting systems of the neighborhoods and provide the municipality an effective strategic plan to develop the renovated university campus area. It is worth underlining that the use of only the measures suggested by the EN 13201-4 are not enough to assess urban security because lighting not directly related to roads are needed for this purpose to include the pedestrians' perception under the different segments of the city areas (including green areas and urban parks). The urban lighting data mapping could drive informed decisions on increasing the public lighting infrastructure since public light can improve social security and perception of physical degradation, increasing community pride and participation to the social good and urban care. The increase of lighting points could be developed with new smart systems able to use renewable energies and dimmer light related to the presence sensors avoiding a waste of energy and recreating a customized living lighting environment which could envision an augmented user experience and environmental and economic sustainability levels. The proposed GIS integration is a powerful tool for urban regeneration, driving urban policies at the local scale with an efficient granularity of intervention that could increase the quality of the urban environment.  
Conceptualization, L.C.T. and F.R.C.; methodology L.C.T., F.R.C, S.R.; software, F.R.C, N.M., P.B.; validation, S.R., F.R.C. and P.B.; formal analysis, N.M.; investigation, F.R.C., N.M., L.C.T.; resources, F.R.C.; data curation, N.M., F.R.C; writing--original draft preparation, L.C.T, N.M.; writing--review and editing, S.R., L.C.T.; visualization, F.R.C., N.M.; supervision, L.C.T., F.R.C, A.L.C.C.; project administration, L.C.T; funding acquisition, F.R.C. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
**Acknowledgments:** The authors would like to thank [PERSON] for the useful discussion about the monitoring setup in the planning phase.  
**Conflicts of Interest:** The authors declare no conflict of interest.