 For quite some time, an extension to Eugendorf, or a cross-border line to Freilassing in Germany, have also been discussed.In December 2016, diesel bus line 20 will be converted to trolleybus line 9 with a new route in the East of Salzburg.Until recently, almost all of the trolleybuses operating on the Salzburg system were made either by the German company MAN or its Austrian counterpart Gräf & Stift.