out as an Autostrasse road at the border crossing Bargen / Neuhaus am Randen, at the border to Germany, crossing a suspension bridge at Schaffhausen over the Rhine, and continues through Zurich's wine country to Winterthur.
The continuation of the N4 national road that leads from Brunnen to Altdorf in the canton of Uri, has the status of a third-class national highway, with the physical role of a main road.