is a 29km long motorway in southern Germany, originally intended to connect Weil am Rhein with the A 8 near Irschenberg.Currently, only three relatively short unconnected sections have been constructed:Weil am Rhein to near Eichsel, where the road diverges south to become the A 861 towards Rheinfelden (Baden) and the Swiss border;east of Waldshut-Tiengen to north of Lauchringen; andnorth of Singen to north of Überlingen.Exit list|- |colspan="3"| ----|- |colspan="2" style="text-align:Center;"||| to Überlingen |}