What type of controls take the form of barriers and guards or signs to warn individuals that a hazard exists?

Controls that take the form of barriers, guards, or signs to warn individuals of hazards are known as physical controls. These controls are designed to create a physical separation between individuals and the hazard, thereby reducing the risk of exposure or injury. Examples include safety barriers around machinery, guardrails on stairways, and warning signs indicating potential dangers in an area. By providing visual or physical deterrents, these controls help ensure safety in potentially hazardous environments.