This study explores how residents govern security in two middle-class neighborhoods in Londrina, the fourth largest city in southern Brazil. Utilizing nodal governance theory, it analyses a security program called Solidary Neighbor (Vizinho Solidário, in Portuguese) in both neighborhoods, in place since the early 2010s. Document analysis, direct observation, and interviews with 26 respondents comprising mostly residents, but also police officers, sex workers, and homeless people, were conducted to assess how the program works and what implications it has for the governance of public spaces. The findings show that the Solidary Neighbor program functions as a community governance node oriented toward reducing criminal opportunities with the use of technologies to monitor outsiders and displace sex workers and homeless people. The article concludes that particularly in contexts such as in Brazil, bottom-up security initiatives have the potential to produce hostile and exclusionary public spaces.

本研究探讨了巴西南部第四大城市隆德里纳的两个中产阶级社区的居民如何管理安全。利用节点治理理论，它分析了一个名为 Solidary Neighbor ( Vizinho Solidário, 葡萄牙语）在两个社区，自 2010 年代初开始就位。对 26 名受访者进行了文件分析、直接观察和采访，其中大部分是居民，但也包括警察、性工作者和无家可归者，以评估该计划的运作方式及其对公共空间治理的影响。调查结果表明，团结邻居计划作为社区治理节点发挥作用，旨在通过使用技术来监控局外人并取代性工作者和无家可归者来减少犯罪机会。文章的结论是，特别是在巴西等背景下，自下而上的安全举措有可能产生敌对和排他性的公共空间。