Since the Prussian
Province of Hohenzollern (Hohenzollern Lands) was an elongated territory partly surrounded by the
Kingdom of Württemberg, the line of the
Royal Württemberg State Railways (
Königlich Württembergischen Staats-Eisenbahnen) at this time only used the shortest route through this "foreign" area and only served the two district towns of
Hechingen (from 1869) and Sigmaringen (from 1878). The HzL as the
Actiengesellschaft Hohenzollern’sche Kleinbahngesellschaft (
Hohenzollern light railway company), now the
Hohenzollerische Landesbahn, was founded in 1899 to build
Kleinbahnen (light railways as authorised by a
Prussian law of 1892) in the Hohenzollern Lands. Kleinengstingen had been connected to the Württemberg railway network by the
Reutlingen–Schelklingen railway since 1893. On 7 November 1901, the HzL station was opened next to the station of the Württemberg State Railways and the line to Gammertingen were put into operation as the fourth HzL line. Seven years later, on 6 December 1908, the second half of the line between Gammertingen and Hanfertal was completed and a connection to the
Ulm–Sigmaringen railway was achieved via the
Sigmaringendorf–Hanfertal railway. A short cut was built when the line was extended to Sigmaringen in 1910, providing a connection to the
Tübingen–Sigmaringen railway.
Passenger services on the Engstingen–Gammertingen section In the course of the nationwide closure of branch lines, the HzL also switched passenger transport to bus service on some routes between 1968 and 1973. In 1969, passenger services were discontinued on the Kleinengstingen–
Trochtelfingen section and in 1972 on the Trochtelfingen–Gammertingen section. From then on, the line was only used for freight traffic and tourist trips. From 2000, regular excursions were again offered with the
Rad-Wander-Shuttle ("bike-hiking shuttle") on Sundays and public holidays between May and October. A new station was built in 2006 for excursions to the ALB-GOLD pasta factory. After extensive renovation and upgrading work, passenger traffic between
Engstingen and
Gammertingen was resumed when the timetable changed in December 2019. The
Schwäbische Alb-Bahn extended its
Ulm–
Schelklingen–Engstingen passenger service to Gammertingen in June 2019. In addition to upgrading the platforms, signalling systems and level crossings, the new
Engstingen Schulzentrum station was built. == Operations ==