NFPA 502 establishes essential fire protection and life safety requirements for road tunnels, bridges, and limited-access highways, focusing on tenable environments, structural integrity, and operational continuity. The standard mandates systems for emergency ventilation, water-based fire-fighting, and enhanced structural fire resistance, with recent editions addressing electric vehicle risks and local emergency agency coordination. For more details, visit National Fire Protection Association (NFPA)
NFPA 502: Standard for Road Tunnels, Bridges, and Other Limited Access Highways NFPA 502 establishes essential fire protection and life
After each event, the NFPA 502 committee revised the standard to incorporate lessons learned, specifically regarding heat flux resistance, structural fire protection for steel bridges, and redundant ventilation systems. If you are downloading the , ensure you have the most current edition (as of this writing, the 2023 edition is the latest) to avoid referencing obsolete requirements. If you are downloading the , ensure you
Covers depressed roadways, cut-and-cover sections with partial roofs, and long viaducts. Focuses on preventing fire spread from a single vehicle to adjacent lanes. If you are downloading the