The BR-153 connects northern Brazil to the south and is one of the longest highways in South America. There is a bar that facilitates prostitution every 45 kilometres, on average. In reality they are clumped around the gas stations where long-distance truckers stop to rest for the night. According the the UN Brazil has 241 separate trafficking routes operating within its borders, 110 service internal trafficking, 131 are for international trafficking, the highest concentration (76) is in the north of the country. Surveys suggest that the primary motivation for entering prostitution is Brazil is economic, it provides single mothers with a means to support their families. Others are escaping domestic and sexual abuse in their family or marital homes. Prostitution is almost never a choice; however, in rural Brazil where family structures are often fluid it is a viable employment option (and sometimes the only option) for a woman living in poverty.