Fire inside the tunnels are very rare, however consequences of such mishaps are extremely grave considering the inside long tunnel environmental condition and the number of people involved. Fire may be caused due to Vehicle accident / Vehicle hitting the tunnel walls and catching fire or partially burning material carrying vehicle entering the long tunnel and the fire getting increased. When the fire breaks out in the tunnels, ventilation can be of a powerfully help. Ventilation prevents back layering of smoke to rescue the stranded passengers from suffocation and ease the rescue operation. Since the rescue operation inside the long tunnel is very difficult, it is always advisable to take out the stranded vehicles/passengers through the nearest tunnel. Bypass to the other tunnel immediately before starting the fire suppression act. The travelling Public is required to be immediately, and the tunnel incoming stopped. Linear heat sensing cables are used inside the tunnel along with controllers to identify the location of fire and the same is integrated with PLC and SCADA , along with Fire Fighting Systems. Fire Fighting methods includes Fire Sprinklers and Hydrants along with Sumps etc as per the standard design procedures .
