sentences:  In the west of Buchenbach, the Bundesstraße B31 (Breisach–Lindau trunk road), the most important link between Freiburg im Breisgau, the Black Forest and Lake Constance, runs through the village of Falkenstein.The Landesstrasse L128 provincial highway runs around the edge of the municipality, through the Wagensteig valley and on to St. Märgen and Thurner.A more direct route to Thurner branches off between Buchenbach and Wagensteig, as the local road K4907 through the Spirzen valley.