The first main lines in the
Jura were built primarily to connect to France and did not serve the
Franches-Montagnes. The then Saignelégier–La Chaux-de-Fonds Railway opened its metre-gauge line from Saignelégier via
Le Noirmont to La Chaux-de-Fonds-Est on 7 December 1892. The extension to
La Chaux-de-Fonds on the
Jura–Simplon Railways had to wait until 28 November 1893, when the
Hotel de Ville rail and road bridge was finished. This also created a connection to the also narrow-gauge
Ponts–Sagne–La Chaux-de-Fonds Railway (PSC). The railway originally had no significant engineering structures except for the Hotel-de-Ville bridge.
Connection of other lines In 1904, the
Régional Saignelégier–Glovelier (RSG) took over operations, creating an important connection to the
Basel–
Delémont–Glovelier–Porrentruy main line, which continued to France. However, the Saignelégier–Glovelier line was built as
standard gauge to facilitate its extensive livestock and timber transportation. Saignelégier became a transhipment station with an intricate system of tracks. To overcome the different gauges,
transporter wagons were used on the Saignelégier–La Chaux-de-Fonds line from May 1915. The neighbouring Ponts–Sagne–La Chaux-de-Fonds railway (PSC) did not have the best connections despite having the same gauge and a shared station. Nevertheless, the Saignelégier–La Chaux-de-Fonds Railway provided PCS services after 1 July 1913 when the
Jura neuchâtelois (JN) was nationalised and incorporated into the
SBB. The
Tramelan–
Breuleux–
Noirmont tramway (
TBN) was opened on 15 November 1913. It was an extension of the Tramelan–
Tavannes railway (TT), which had opened in 1884. Because unlike the SC, the TBN has been electrically operated since its opening, continuous services between La Chaux -de-Fonds-Bahn and Tavannes were limited. The TBN and TT were merged in 1927 to form the
Tavannes–Noirmont Railway (
Chemin de fer Tavannes-Noirmontm, CTN).
Operating results The main source of income for the Saignelégier–La Chaux-de-Fonds Railway was passenger transport, although freight transport also played an important role. After the second year of operation, the operating results always showed a profit, which was invested as a reserve. The First World War did not affect the financial position either. After the war, however, operating costs rose sharply and its financial situation became precarious. In addition
Alsace was returned to France after the war, which made the Basel–Delle line much less important. After 1918, the railway remained in deficit and the facilities and rolling stock became obsolete. To enable a thorough renewal of the line, it merged with the RSC, the CTN and the
Régional Porrentruy–Bonfol (RPB) to form the
Chemins de fer du Jura (CJ) in 1944. == Operation by the Chemins de fer du Jura ==