Herbertingen–Isny railway

The Herbertingen–Isny railway (also known in German as the Württembergische Allgäubahn or Württemberg-Allgäu-Bahn—Württemberg Allgäu Railway) is a single-track railway in the German state of Baden-Württemberg. The Leutkirch–Kißlegg section is part of an upgraded long-distance route between Munich and Lindau, which was completed in 2020.

Herbertingen–Isny railway
Overview
Native nameWürttembergische Allgäubahn
StatusLeutkirch–Isny not in operation
OwnerDeutsche Bahn
Line number4550
LocaleBaden-Württemberg, Germany
Termini
Stations6
Service
Route number
  • 752 (Aulendorf–Bad Wurzach)
  • 753 (Sigmaringen–Memmingen/Hergatz)
  • 754 (Aulendorf–Pfullendorf)
History
Opened25 July 1869
Completed15 August 1874
Technical
Line length84.539 km (52.530 mi)
Number of tracks1
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Minimum radius573 m (1,880 ft)
Electrification15 kV 16.7 Hz AC
(Kißlegg–Leutkirch)
Operating speed100 km/h (62 mph)
SignallingPZB
Maximum incline1.06%
Route map

km
from Sigmaringen
0.000
Herbertingen
548 m
to Ulm
1.914
Herbertingen Ort
560 m
3.200
Mieterkingen
8.997
Bad Saulgau
593 m
13.100
Hochberg
617 m
from Schwackenreute
19.463
Altshausen
572 m
23.600
Steinenbach-Blönried
567 m
from Friedrichshafen
28.012
Aulendorf
547 m
to Ulm
37.487
Bad Waldsee
597 m
from Bad Wurzach
45.345
Roßberg
651 m
48.146
Alttann
50.853
Wolfegg
677 m
55.600
Hahnensteig-Krumbach
57.700
Kißlegg
651 m
60.400
Reipertshofen
63.400
Gebrazhofen
66.000
Heggelbach
68.612
Leutkirch
652 m
to Memmingen
Rauns
73.800
Urnau
74.000
Urnau yard (from 1976)
to Urnau munition facility (1935–1948)
Eschach
77.300
Friesenhofen (until 1976)
80.800
Aigeltshofen (until 1976)
Untere Argen (34 m)
from Kempten
84.539
Isny
697 m
Source: German railway atlas

The line is operated by Deutsche Bahn’s subsidiary DB ZugBus Regionalverkehr Alb-Bodensee under contract to Nahverkehrsgesellschaft Baden-Württemberg (NVBW), an agency of the government of Baden-Württemberg responsible for providing public transport.

The line originally connected Herbertingen on the Danube with Isny im Allgäu, but the section from Leutkirch to Isny is closed. Originally it was 84.539 kilometres long and classified as a main line, but the section that is now closed was later reclassified as a branch line. The Kißlegg–Leutkirch section was electrified as part of the upgrading and rerouting of the main line between Munich and Lindau, which was completed in December 2020. The Herbertingen–Aulendorf section used to be part of the so-called Zollernalbbahn (Zollernalb Railway) from Tübingen to Aulendorf.

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