To limit access to work areas, what type of signs should be used?

Warning signs are essential for limiting access to work areas as they effectively communicate potential hazards and safety risks present in those zones. These signs typically employ bright colors and symbols that clearly indicate danger, thereby alerting individuals to exercise caution or avoid the area entirely.

Using warning signs not only informs people of the risks but also serves a legal purpose by demonstrating that precautions have been taken to notify others about potential dangers. This is particularly important in trauma and crime scene cleanup, where exposure to biohazards or unsafe conditions can pose significant health risks.

In contrast, information signs generally provide non-hazard-related information, standard signs may refer to basic operational or location-based notices, and negotiation signs do not pertain to safety procedures or limiting access. Thus, for the specific purpose of controlling access due to potential dangers, warning signs are the appropriate choice.