This research investigates the visual communication for orientation in the urban spaces of the city of Rio de Janeiro, its emitters, media, and receptors, with the purpose of evaluating its discursive extension and to speculate on its probable approach potential among the informal (or of informal origin) areas, and the group of the city, contributing to the declared town hall intention of integrating the whole urban environment. Portraying the social and morphological reality of five informally originated communities of the district Maré, it observes the actions and omissions of the official agents responsible for this communication in the public space and it identifies needs of paradigm changes, and ergonomic and enunciative adaptations, so that the systems of visual communication for orientation in these places, dense and organic, could be a powerful instrument to strengthen the public power in these places.