along with constructing the motorway, after invading poland the germans also quickly upgraded the main road going to east prussia, in places paving it with concrete. even though it is only a single carriageway road and not a motorway, it is also considered to be a part of the berlinka's route. this section includes one interesting cloverleaf interchange () some 34.5 km south-southeast of gdansk, and a large bridge over the vistula south of tczew ().