Caution Safety signs warn employees and others of potential workplace hazards in a concise and attention-getting format, helping to reduce the risk of injuries on the job. They also alert workers to the location of safety equipment and exit routes and offer safety-related instructions. Access signs deter people from entering restricted or dangerous areas. Electrical hazard signs clearly mark areas with high voltage equipment. Machine signs warn workers of dangerous areas on or near operating machines or equipment. Safety culture signs remind personnel that safety in the workplace always comes first. Caution Safety signs are found in all workplaces, including offices, warehouses, factories, hospitals, and schools.