NFPA 502:2023

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. 1.4 Retroactivity. 1.5 Equivalency. 1.6 Units. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Mandatory Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 General Requirements 4.1 Level of Fire Protection. 4.2 Safeguards During Construction. 4.3 Fire Protection and Fire-Life Safety Factors. 4.4 Emergency Response Plan. 4.5 Emergency Communications. 4.6 Signage. 4.7 Commissioning and Integrated Testing. 4.8 Noncombustible Material. 4.9 Structural Anchorage.Chapter 5 Limited Access Highways 5.1 General. 5.2 Traffic Control. 5.3 Fire Apparatus. 5.4 Protection of Structural Elements. 5.5 Incident Detection. (Reserved) 5.6 Fire Hydrants. (Reserved) 5.7 Drainage. Chapter 6 Bridges and Elevated Highways 6.1 General. 6.2 Application. 6.3 Protection of Structural Elements. 6.4 Incident Detection. 6.5 Traffic Control. 6.6 Standpipe, Fire Hydrants, and Water Supply. 6.7 Portable Fire Extinguishers. 6.8 Drainage. 6.9 Hazardous Locations. 6.10 Control of Hazardous Materials. 6.11 Joints Between Structural Elements. Chapter 7 Road Tunnels 7.1 General. 7.2 Application. 7.3 Protection of Structural Elements. 7.4 Fire Alarm and Detection. 7.5 Emergency Communications Systems — Two-Way Radio Communication Enhancement System. 7.6 Tunnel Closure and Traffic Control. 7.7 Fire Apparatus. (Reserved) 7.8 Standpipe, Fire Hydrants, and Water Supply. 7.9 Portable Fire Extinguishers. 7.10 Fixed Water-Based Firefighting Systems. 7.11 Emergency Ventilation. 7.12 Tunnel Drainage System. 7.13 Alternative Fuels. (Reserved) 7.14 Control of Hazardous Materials. 7.15 Flammable and Combustible Environmental Hazards. 7.16 Means of Egress. 7.17 Acceptance Test.Chapter 8 Roadways Beneath Air-Right Structures 8.1 General. 8.2 Application. 8.3 Traffic Control. 8.4 Protection of Structure. 8.5 Emergency Ventilation. 8.6 Drainage System. 8.7 Control of Hazardous Materials. 8.8 Emergency Response Plan. 8.9 Standpipe, Fire Hydrants, and Water Supply. 8.10 Acceptance Test. Chapter 9 Fixed Water-Based Firefighting Systems 9.1 General. 9.2 Design Objectives. 9.3 Water Supply. 9.4 Performance Evaluation. 9.5 Tunnel Parameters. 9.6 System Design and Installation Documentation. 9.7 Engineering Design Requirements. Chapter 10 Standpipe Systems 10.1 General. 10.2 Water Supply. 10.3 Fire Department Connections. 10.4 Hose Connections. 10.5 Fire Pumps. 10.6 Identification Signs.Chapter 11 Emergency Ventilation 11.1 General. 11.2 Smoke Control. 11.3 Design Objectives. 11.4 Basis of Design. 11.5 Fans. 11.6 Dampers. 11.7 Sound Attenuators. 11.8 Controls. 11.9 Flammable and Combustible Liquids Intrusion. Chapter 12 Electrical Systems 12.1 General. 12.2 Wiring Methods. 12.3 Installation Methods. 12.4 Emergency Power. 12.5 Reliability. 12.6 Emergency Lighting. 12.7 Security Plan. 12.8 Wayfinding Lighting. Chapter 13 Emergency Response 13.1 General. 13.2 Emergency Incidents. 13.3 Emergency Response Plan. 13.4 Participating Agencies. 13.5 Operations Control Center (OCC). 13.6 Liaisons. 13.7 Emergency. 13.8 Training, Exercises, Drills, and Critiques. 13.9 Records.Chapter 14 Regulated and Unregulated Cargoes 14.1 General. Chapter 15 Periodic Testing 15.1 General. Annex A Explanatory Material Annex B Tenable Environment Annex C Temperature and Velocity Criteria Annex D Smoke Control Annex E Fixed Water-Based Systems in Road Tunnels Annex F Emergency Response Plan Outline Annex G Alternative Fuels Annex H The Memorial Tunnel Fire Ventilation Test Program Annex I Tunnel Ventilation System Concepts Annex J Control of Road Tunnel Emergency Ventilation Systems Annex K Fire Apparatus Annex L Motorist Education Annex M Automatic Fire Detection Systems Annex N Autonomous Vehicles Annex O Informational References

This standard provides fire protection and fire-life safety requirements for limited access highways, road tunnels, bridges, elevated highways, depressed highways, and roadways that are located beneath air-right structures.