John and his team quickly got to work, using their training and equipment to battle the fire. They deployed a fog nozzle to cool the surrounding area and prevent the fire from spreading, while another team member used a thermal imaging camera to locate the source of the fire.

The team knew they had to follow the guidelines outlined in the NFPA 502 Standard for Road Tunnels, Bridges, and Other Limited Access Highways. This standard provided critical guidance on the design, construction, and operation of road tunnels, bridges, and other limited access highways.

It was a typical Monday morning for John, a firefighter with the city of Los Angeles. He and his team had been called to a fire in a road tunnel that connected downtown LA to the San Fernando Valley. The tunnel, which was a major thoroughfare, had been closed due to a tanker truck crash that had spilled fuel everywhere.