This system supplies adequate fresh air at the Laerdal side of the tunnel; yet, something more had to be done for the Aurland side, which is longer.
See süsteem varustab piisava värske õhuga tunneli Lærdali - poolset osa. Kuna aga Aurlandi - poolsem osa on pikem, tuleb seal puhta õhu tagamiseks teha midagi enamat.