The tunnel is equipped with 25 evacuation rooms. These can be sealed off from the main tunnel and can each provide pressurized space for thirty to fifty people while a fire is being fought. There is a natural flow of of sea- and ground water into the tunnel every minute. To handle this a pump system is installed capable of draining per minute. There is a natural reservoir under the tunnel able to retain of water, which can act as a buffer. It can also be used as a water source for the fire department. The tunnel is built with continual concrete elements to ensure better protection against water leaks. The structure has received artistic decorations in the form of gobo lighting.