Danube-Iller Regional S-Bahn

The Danube-Iller Regional S-Bahn is a "regional" S-Bahn system in the Ulm and Neu-Ulm area. It operates Regionalbahn services on electrified and non-electrified lines. Its core is Ulm Hauptbahnhof, which acts as a hub between the regional S-Bahn lines, other regional services and long-distance services. In December 2020, the first two RS lines from Ulm to Memmingen and Weißenhorn were put into operation in the Bavarian part of the Danube-Iller planning region. When the 2021/2022 timetable changed, three more lines followed in the Württemberg part of the region on the southern railway to Biberach, on the Danube line to Munderkingen and on the Brenz Railway to Aalen. Further lines are to be added in the following years. The network is expected to be completed by 2030.
The Danube-Iller Regional S-Bahn is administered by the Donau-Iller-Nahverkehrsverbund GmbH and two neighbouring transport associations, the Heidenheimer Tarifverbund and OstalbMobil.

WWW rsb-di.de

Line network

The following lines are planned or had already been established in 2021:

Line	BEG/NVBW line	DING line	Start of operation	Rolling stock	Operator	Route	Lines used
		R2	12 December 2021	Class 425	DB Regio BW	Ulm Hbf – Erbach – Laupheim West – Biberach an der Riß – Ummendorf – Bad Schussenried –	Ulm–Friedrichshafen
		R2	12 December 2021	Class 425	DB Regio BW	Ulm Hbf – Erbach – Laupheim West – Laupheim Stadt – Biberach an der Riß – Ummendorf	Ulm–Friedrichshafen
		R3	12 December 2021	LINT 54	SWEG	Ulm Hbf – Blaubeuren – Schelklingen – Ehingen (Donau) – Munderkingen	Ulm–Sigmaringen
		R3	planned in the medium term			Munderkingen – Riedlingen '
RS4		R4	planned in the medium term			Ulm Hbf – Amstetten – Geislingen	Stuttgart–Ulm
		R5	12 December 2021	LINT 54	SWEG	Ulm Hbf – Langenau – Niederstotzingen – Sontheim an der Brenz – Giengen – Herbrechtingen – Heidenheim an der Brenz – Oberkochen – Aalen Hbf	Aalen–Ulm
		R5	12 December 2021	LINT 54	SWEG	Ulm Hbf – Langenau	Aalen–Ulm
	RS7	R7	13 December 2020	LINT 41, 54	DB Regio Bayern	Ulm Hbf – – Senden – Illertissen – Memmingen	Kempten (Allgäu)–Neu-Ulm
	RS7	R7	planned in the medium term			Memmingen – Buxheim '	Leutkirch–Memmingen
	RS71	RS71	13 December 2020	LINT 41, 54	DB Regio Bayern	Ulm Hbf – Neu-Ulm – Senden – Weißenhorn	Ulm–Sigmaringen – Kempten –Neu-Ulm – Senden–Weißenhorn
RS8		R8	planned in the long term			Ulm Hbf – Neu-Ulm – Nersingen –	Augsburg–Ulm
RS81	/ / /	R8	planned in the long term			Günzburg – Krumbach (Schwaben) –	Augsburg–Ulm – Günzburg–Mindelheim
RS81	/ / /	R8	optional			Mindelheim – – Buxheim	Buchloe–Memmingen – Leutkirch–Memmingen