Reflectors are retroreflective devices installed on roads, signs, and other infrastructure to improve nighttime visibility for drivers. Road reflectors include raised pavement markers (cat's eyes), reflective strips on guardrails, and reflective sheeting on signs. When vehicle headlights hit reflectors, light bounces back toward the driver, making lanes, edges, and signs visible in darkness. Municipal public works departments install and maintain reflectors on local roads as part of traffic safety programs. Reflector maintenance—replacing damaged or faded units—is ongoing road safety work. Standards specify reflector colours: white for lane lines, yellow for centre lines, and red for hazards or wrong-way warnings.