From late July to late August each year, to coincide with the Salzburg Festival, the ÜHIIIs runs on a regular basis every Friday, on a special heritage line of the Association Pro Obus Salzburg eV.
Wals-Siezenheim is located immediately at Salzburg Airport with access to the Salzburg trolleybus system.
Salzburg | Salzburg Festival | Mozarteum University of Salzburg | University of Salzburg | FC Red Bull Salzburg | Archbishopric of Salzburg | Salzburg Cathedral | EC Red Bull Salzburg | Trolleybuses in Salzburg | Salzburg (state) | Salzburg Airport | Rupert of Salzburg | Poetry Salzburg Review | Trolleybuses in Arnhem | St. Peter's Archabbey, Salzburg | Salzburg Global Seminar | Roman Catholic Archdiocese of Salzburg | Red Bull Arena (Salzburg) | Oberndorf bei Salzburg | Vergilius of Salzburg | Trolleybuses in Zürich | Trolleybuses in Varna | Trolleybuses in Rimini | Trolleybuses in Lausanne | Trolleybuses in Ipswich | Trolleybuses in Dayton | Sankt Georgen bei Salzburg | Salzburg Research | Salzburg Marionette Theatre | Porsche Salzburg |
Similar vehicles with the type designation AG300T were later supplied to the trolleybus systems in Esslingen am Neckar, Salzburg, Solingen and Arnhem.