KIM HARRISBERG FROM a women-only driving school to an all-female taxi service - a South African activist-turned-entrepreneur is tackling high rates of sexual assault by providing safe transport in one of the country's most crime-ridden areas. The Cape Flats, which lies on the outskirts of the popular tourist city of Cape Town, is notorious for gang warfare, and sexual violence is an everyday fear for women taking taxis or using public transport in the area, said Joanie Fredericks. Launched last week, Fredericks said her taxi service, Ladies Own Transport, had already received calls from women requesting a ride to work…