Brenner Railway is situated at the border between Italy and Austria and also the operational border between the ÖBB and FS networks. The two companies operate different electrical systems, (15,000 V AC at 16.7 Hz in Austria, and 3,000 V DC in Italy), which requires a stop to change electric locomotives. For this reason, for a long time the operation of express trains from Munich to Verona and Milan was carried out with diesel railcars. Until 30 May 1965 was also needed a second engine change in Bolzano station, as the Bolzano–Brenner section still operated under three-phase AC electrification. In recent years
Brenner Pass in 268 AD, but they were stopped in November of that year at the Battle of Lake Benacus. The Romans kept control over the mountain pass until their end of the empire, in the 5th century. During the High Middle Ages, Brenner Pass was a part of the important "Via Imperii", an imperial road linking the Kingdom of Germany north of the Alps with the Italian March of Verona. In the carolingian "Divisio Regnorum" of 806 the Brenner region is called "per alpes Noricas", the transit through the Noric Alps. Since the 12th century, Brenner Pass was controlled by the