The line was built between 1882 and 1886, to link
Saint-Georges-de-Commiers and
La Mure through a mountainous region of the
department of
Isère. The long,
metre gauge line runs from
La Motte-d'Aveillans and La Mure to a connection with the main line of the
PLM railway at Saint-Georges-de-Commiers. The line was almost closed in the mid-1970s and if the country hadn't been suffering an oil crisis the line would have met its end. Its life was extended by fifteen years, which proved to be its saviour. Unlike many other lines this became a tourist attraction which combines an area of industrial heritage with some of the finest scenery on any similar line on the continent. The railway was electrified in 1903, using a symmetrical current power supply with two
overhead lines at plus and minus 1200
volts direct current respectively. In 1950, this non-standard system was replaced with a conventional power supply with a single overhead line at 2400 volts direct current. The
branch line between La Mure and Corps was opened in 1932 and closed for passenger traffic in 1952. Coal traffic ceased in 1988, and most of the coal installations were demolished, the coal being transported by road. The
Matheysine coalmines were finally closed on 28 March 1997. The SGLM found a new vocation in providing a tourist attraction and as a result, there remain all of the line's historical installations, the workshops, forge, joinery shop, etc. The network's departure and arrival stations were dependent on connections with the PLM railway's Grenoble–Veynes line. The necessary facilities together with the transhipment platform for the automatic transfer of the coal from the SGLM coal cars to the trains operated by PLM (which became SNCF in 1938) were built adjacent to the PLM station, today the station for the Chemin de fer de La Mure. == Rolling stock ==