NFPA Standard 170 provides guidance on:

NFPA Standard 170 specifically addresses fire safety symbols, which are crucial for enhancing understanding and communication regarding fire hazards and safety measures. The standard provides a framework for developing clear and consistent symbols that can be recognized universally across different jurisdictions and disciplines. This helps improve the effectiveness of fire safety signage and ensures that individuals can quickly understand important information about fire risks, equipment, and evacuation routes.

In contrast, the other options relate to different aspects of fire service management and safety. While personnel training, investigation procedures, and communication protocols are vital components of fire service operations, they fall under different NFPA standards. NFPA 170 is uniquely focused on the graphical symbols and their standardized meanings to promote public safety and awareness regarding fire-related hazards.