and Lindau, although this was not implemented. The relocation of Lindau station to the mainland had already been considered at that time as it would make sense if a new railway tunnel was built through the Alps. The then planned Splügen Railway (Splügenbahn) formed the background for the planning of the electrification and its timing. Switzerland in particular wanted to use the Munch–Memmingen–Lindau route as an important access route for this unrealised Alpine crossing. Die Länderbahn operated a service known as the Allgäu-Express on the line from the end of 2003, initially in partnership with the Swiss Federal Railways. It was called the Arriva-Länderbahn-Express from 2007 to 2010 and then the alex until the end of its concession on 13 December 2020. Heimenkirch station was reopened with the timetable change on 12 December 2010. Since the beginning of 2011, individual sections of the Buchloe–Lindau line have been upgraded for the operation of tilt trains, allowing operations at up to 160 km/h. The tilting technology operation was integrated into the timetable at the timetable change on 11 December 2011. The journey time from Augsburg to Lindau was reduced by 25 minutes (from 2:32 to 2:07). Beginning at the timetable change in December 2014, a total of seven trains were operated with new TRAXX (class 245) diesel locomotives and double-decker cars on the Munich–Füssen route and during peak hours on the Munich–Kempten route, replacing trains composed of class 218 locomotives and single-decker Silberling cars. The Oberstaufen Tunnel, which previously could only be operated at 30 km/h, was renovated in 2016 and extended to 160 metres. The line between Immenstadt and Oberstaufen was closed from 3 April to 6 December 2016. As part of the construction work, the Oberstaufen station was rebuilt with sets of points, restoring its status as a Bahnhof (full station). In February 2008, Germany and Switzerland signed a letter of intent committing to upgrading the Munich–Lindau line and electrifying the previously non-electrified section between Geltendorf and Lindau. It was eventually decided to electrify and upgrade the alternative route via Memmingen. On the Buchloe–Lindau line, only the 23 kilometre-long section was electrified. Deutsche Bahn commenced electrical operations on the Hergatz–Lindau-Aeschach junction section in December 2020. As a result, the international connections via Kempten were discontinued at the timetable change on 13 December 2020. During the construction phase, however, from December 2019, long-distance trains were routed over the Buchloe–Lindau line with