International audienceSegregation processes in contemporary cities are usually studied through the analysis of residential locations. Our paper, however, focuses on the way a specific study on residential spaces and daily mobility patterns can offer a renewed approach of segregation. This leads us to describe proximity behaviors (immobility and local life) and contrasted access to activities and urban territories. This research concerns Niamey in Niger, where concentrated activities and hard conditions of mobility have many social consequences.Alors que l’étude de la ségrégation dans les villes contemporaines se limite généralement à une approche des localisations résidentielles, le parti-pris de cet article est d’étudier certains comportem...