Downloading the PDF is just the first step. Because the document is updated every 3 to 5 years, professionals must treat it as a living tool:
Chapter 7 addresses means of egress for road tunnels, including requirements for exit spacing. For a tunnel classification, exits spaced at a maximum of 1000 ft is a mandatory requirement (MR). The overarching design criterion is to provide a tenable environment for evacuation for the time required for egress. Downloading the PDF is just the first step
Fiber-optic cables or digital cables that detect precise temperature changes along the entire length of the tunnel. Downloading the PDF is just the first step