These terms all refer to safety devices designed for emergency situations, featuring reflective materials and anti-collision properties to enhance road safety. The reflective elements ensure high visibility even in low-light or dark conditions, alerting drivers to potential hazards ahead. The anti-collision design—often made of durable, impact-resistant materials like high-density plastic or rubber—helps absorb or deflect force, reducing the risk of damage to vehicles or injury to individuals. They are commonly used in roadwork zones, accident scenes, or emergency detours to cordon off areas, guide traffic flow, and prevent collisions, serving as a critical safety tool for maintaining order and protecting lives in urgent scenarios.