Type of Structure
The tunnel is made of 18 caissons. There is one lane of traffic in each direction and a sidewalk on the north side. Three ventilation shafts (one air outlet and two air intake shafts) ventilate the tunnel. The two traffic lanes are separated by a central support structure forming the first ventilation shaft (air outlet). The second ventilation shaft (air intake) is located on the south side of the caissons, while the third is on the north side under the sidewalk.
The caissons lie directly on rock.