What is the primary purpose of high-visibility vests on the ramp?

High-visibility vests are essential on the ramp due to the critical need for visibility in environments where aircraft and ground vehicles operate in close proximity. The primary function of these vests is to make personnel easily identifiable to aircraft operators and other ground staff. This is vital for safety, as it helps prevent accidents and ensures that everyone on the ramp is aware of each other's presence, especially in potentially hazardous situations where heavy equipment and moving aircraft are involved. Their bright colors and reflective materials significantly enhance visibility in various weather conditions and lighting, making it easier for those operating aircraft or vehicles to see ramp personnel, thereby reducing the risk of collisions and injuries.