Bundesstraße 22 (abbreviated to B 22) is a German federal highway that runs from Würzburg (branching off the B 8 near Rottendorf) in Lower Franconia, through the Upper Franconian cities of Bamberg and Bayreuth and the Upper Palatine town of Weiden, to Cham. The highway acts as a bypass for the Upper Franconian villages of Seybothenreuth and Speichersdorf as well as the Upper Palatine towns of Kemnath, Erbendorf, Oberviechtach and Rötz, running past Cham (Oberpfalz), where it joins the B 20 and B 85 highways. Between Erbendorf and Cham the B 22 is part of the Bavarian Ostmark Road, that was completed in 1938. From Wikipedia
