NFPA 502 establishes the definitive international standard for fire protection and life safety in road tunnels, bridges, and limited-access highways. The 2023 edition addresses modern risks, including emergency ventilation for alternative fuel vehicles and structural protection against high-intensity fires. To access the full standard and technical documents, visit
Smoke is the primary killer in tunnel fires. Unlike open roads, smoke cannot dissipate easily in a tunnel. NFPA 502 mandates ventilation systems designed to control smoke movement and provide a smoke-free path for evacuation. Emergency Ventilation Smoke is the primary killer in
Note: For official compliance, engineering design, or legal purposes, always refer to the most current edition of the NFPA 502 handbook published by the National Fire Protection Association. Note: For official compliance, engineering design, or legal
Bridges and Elevated Highways: Specific requirements for standpipes and water supply. exploring its scope
road tunnels, bridges and other limited access highways - Seattle.gov
What is NFPA 502?
This article provides an overview of NFPA 502, exploring its scope, classification system, and critical safety requirements.