Smoke is the leading cause of death in tunnel fires. The standard dictates requirements for:
NFPA 502 is often used alongside:
Full Title: NFPA 502 – Standard for Road Tunnels, Bridges, and Other Limited Access Highways
Issuing Body: National Fire Protection Association (NFPA)
Key Application: Design, construction, operation, and maintenance of fire protection and life safety systems in road tunnels (≥ 240 m / ~800 ft), bridges with enclosed toll plazas, and limited-access highways. Smoke is the leading cause of death in tunnel fires
✅ Not covered: Rail tunnels, utility tunnels, or underground parking garages (see NFPA 130, 520, 88B respectively). Full Title: NFPA 502 – Standard for Road
In a dark, smoke-filled tunnel, panic is the greatest enemy. ✅ Not covered: Rail tunnels, utility tunnels, or
Keywords: NFPA 502 Standard for Road Tunnels, Bridges, and Other Limited Access Highways PDF, fire safety, ventilation, life safety