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'''5th option''' To leave Frankfurt in the direction of Cologne or Ruhrgebiet westward - as well as Würzburg, Passau, Vienna or Munich (via Würzburg) eastward you should consider hitchhiking from "Rastanlage Weiskirchen". From Frankfurt DB main train station you should take suburban train (S-Bahn) S1 (indicating: "Rödermark Ober-Roden") to the stop "Weiskirchen". Wander through the town on "Bahnhofstraße", "Schillerstraße" and "Pommernstraße", later through the cropfields first in east- then in northward direction until you can see the Autobahn. There is two sides of "Rastanlage Weiskirchen", north and south. A roadbridge over A3 /E42 (east of the station) connects both sides. From Frankfurt you can reach this place in around 60 minutes.