From Zurich, one has to follow the highway towards Sargans. At Sargans change to the highway A13 towards St. Margrethen. Leave the highway at exit Sevelen / Vaduz.  Now follow the yellow line on the map above.

From St. Gallen, one has to follow the highway until the exit Sevelen / Vaduz. Leave the highway here and follow the yellow line on the map above.