A cross guard is a safety feature commonly found at railway crossings. It consists of barriers or gates that automatically lower when a train approaches, preventing vehicles and pedestrians from crossing the tracks. This helps to reduce the risk of accidents and ensures that everyone remains safe while trains pass. In addition to physical barriers, cross guards may also include warning lights and sounds to alert people of an oncoming train. These systems are designed to enhance safety at crossings, especially in areas where train traffic is frequent, making them an essential part of railway infrastructure.