Life in the street and on the street, mixed functions along the street and friendly edge zones are key qualities for good cities — also in terms of safety and protection. The polar opposite is the perfect recipe for an insecure urban environment: lifeless streets, mono-functional buildings devoid of activity for most of the day, closed, lifeless and dark façades. To this list we can add insufficient lighting, deserted paths and pedestrian tunnels, dark nooks and crannies, and too many bushes. In the face of this rather depressing scenario it is important to remember that almost any enticement to invite people to walk, bicycle and stay in city space will also contributes to a greater sense of security.