Nfpa 502 Standard For Road Tunnels- Bridges- And Other Limited ....pdf ((new)) Guide

Applies to tunnels, but also specific sections for:

Integrates with NFPA 72. Types of detectors include linear heat detection (LHD), flame detectors, or video smoke detection. Applies to tunnels, but also specific sections for:

If you are designing or inspecting to NFPA 502, also review: Applies to tunnels