The article discusses the proposal and implementation of the concrete nighttime reflective paint "Re-Flex" at a section of the "Bicycle Lane Improvement Project" in Minami Ward, Hiroshima City, as part of efforts to ensure community safety by maximizing the existing stock of social capital and the city's initiative for "people-friendly road spaces." It highlights how applying "Re-Flex" can enhance safety, consider environmental and aesthetic factors, provide a low-cost solution that is safe and secure, and the anticipated expansion into various future applications. For more details, please refer to the materials below.