The article investigates personal safety conditions in the Sa˜o Paulo metro,the largest rapid transit system in Brazil. The study looks at all types of crimes, butdevotes special attention to the nature and spatio-temporal dynamics of sexualcrimes against women while in transit. The methodology combines GeographicalInformation System and crime records with data collected using Google Street Viewand other secondary data into a set of regression models. Findings show that sexualviolence is concentrated at the busiest central stations; it often takes place during themorning and afternoon rush hours, and at stations that also attract all sorts ofviolence and events of public disorder. The study finalises with an analysis of themetro’s current prevention practices targeting women’s sexual victimisation.