The road tunnelon the Słowackiego route takes vehicles under the river Vistula, linking theeastern part of the port with the western part on the level of the timber portand the banks of the river Vistula in the port of Gdańsk. The shield-tunnelledstructure was planned as a system of connected rings made of reinforcedconcrete, with the service buildings at either end. Both tunnels are connectedby 7 cross links. The river Vistula has a width of approx. 210 m and a depth ofapprox. 12 m at the point where the tunnel crosses.