: Roadways located beneath buildings or other structures. Key Features and Safety Systems
: Criteria for emergency response planning and traffic control. : Roadways located beneath buildings or other structures
Fire safety in tunnels - fire boards and fire cladding - Tunnel Fire Protection : Roadways located beneath buildings or other structures
The is the industry-defining safety standard providing minimum fire protection and life safety requirements for transportation infrastructure. The current version is the 2026 Edition , which introduces critical updates for modern vehicle technologies and refined emergency ventilation methods. Scope and Purpose of NFPA 502 : Roadways located beneath buildings or other structures