In case of an unexpected incident, both hot and cold tunnels are equipped
with a high-pressure water mist extinguishing system. Should, for example,
a vehicle component catch fire, perhaps as a result of overheating brakes, jet nozzles will shoot up out of the floor in just fractions of a second to smother the fire in a fine mist of tiny water droplets.
This mist has the effect of cutting off the supply of oxygen to the fire, while the large surface area of the water droplets also cools the vehicle down and prevents any further fire. Another positive effect: even if a test engineer is still inside the vehicle, the extinguishing system can nevertheless be immediately triggered.