The Etzwilen–Singen railway line was built by the
Schweizerische Nationalbahn (SNB) and opened on 17 July 1875, on the same day as the
Lake Line sections between and and between and and the
Winterthur–Etzwilen railway line between Etzwilen and . The SNB went
bankrupt in 1878, and the Etzwilen–Singen railway was subsequently operated by the
Schweizerische Nordostbahn (NOB). In 1902, the NOB was subsumed into the
Swiss Federal Railways (SBB CFF FFS), which continued passenger train services on the line until 31 May 1969. The line was used for the
rolling highway between
Lugano and Singen. In 1996, these operations were shortened to Rielasingen and on 12 December 2004, freight train services ceased on the entire Etzwilen–Singen railway line. Some of the reasons for the termination were the limited strength of the Hemishofen railway bridge and the fact that the line had never been
electrified. In fact, when it closed in 2004, it was the only railway line of Swiss Federal Railways that was not electrified. The route section between Singen and Rielasingen was for several years inoperable because part of the
railway track had been removed during the construction of a
roundabout in Singen. The missing section was rebuilt in 2019 and the railway line reopened to heritage train services on 16 August 2020. ==Current use==