The Séjourné Viaduct which is entirely in granite, is 65m high, 230m long and is composed of a main arch of 30m wide, supporting 16 smaller arches in the Gothic style,
above the Têt River.
The Gisclard bridge, built between 1905 and 1908, was considered at the time as a real technical revolution.
It has a central span of 156m between the axis of the
piers and two half spans of 39m. Its deck has a slope of 6% and stands at 80m height. The 32m high piers support pylons of 30m. At the top of the pylons some guys and retaining cables are fixed to the dilatation fitting. These
cables are fixed in the mountain. It is the first bridge of a new generation resolving the load bearing problem the railways were having. Albert GISCLARD, the inventor of this new concept, was a mathematician and engineer born
Unfortunately he was killed on October 31, 1909 during the official test ride. His train left earlier than scheduled and was not yet equipped with the electric braking system chosen by the service. The train
plunged down 450m, crashing on the rocky mountains.
Since this tragedy, no other incident never occurred.
Mr Arnodin was the constructor of the bridge. He also built the transporter bridges of Marseille, Nantes and Rouen.
Specially conceived rolling stock of railcars and slip coaches are used to adapt the relief obstacles.
These trains can climb slopes of 15 to 60
mm/m and their 300 horse power self propelled locomotive (it represents four engines) can navigate bends of 80 m radius.
They are equipped with three different brake systems which are: rheostat brakes, Westinghouse automatic
brakes and mechanical ones.
Security chains complete the double automatic coupling called the Leduc Lambert system.
The coaches can accommodate 44 seats for the Midi carriages (Southern carriages), 46 for the Nord
(Northern) carriages , and 59 seats in open summer carriages.
These carriages were built in local workshops as they were specific to this special railway.
Except these particular coaches, the regular ones (Nord and Sud ones), were given two facelifts.
From 1963 to 1966 the trains were painted with the Catalan colours : "gold and blood" in the Marseilles Prado workshops. Later the Béziers workshops did a
complete overhaul of the undercarriages and driver's posts. At the same time a new coat of paint was given to represent the actual symbol of the train : all yellow enhanced by a red stripe, thus corresponding to the name
"Train Jaune" (Yellow Train).
In order to cope with snowfalls, there are two snowploughs with blades and one with a turbine to clear the snow between the rails.
The 850 volts direct currents supplied by a lateral contact rail, set up on top of ceramic supports and totally insulated in public areas. The
electricity is produced by an hydroelectric power station located in the Têt Valley.
The Bouillouses dam, situated at an altitude of 2000m, was built in 1910. Its capacity is 17.500.000 m3 and a 160 ha (395.360 acres) lack.
The 20.000 Volts current supplies seven sub-power-stations for the train traction.
These sub-stations are operated by remote control from Montpellier. They are located in Villefranche, Thuès-les-Bains, Fontpédrouse,
Mont-Louis, Font-Romeu, Sainte-Léocadie and in Bourg-Madame.
The authorised speed limit is 55 km/h. Speed limits are indicated on black square signs with a yellow triangle.
The composition of coaches cannot exceed six units. Each self-propelling-coach can pull one carriage. The maximum tonnage corresponds to the formula : 52 tons multiplied by the number of railcars in service.
de Ligne" is based in Villefranche. His responsibility is to organise the running of the service.
Overtaking and crossings are only possible in the following stations : Olette, Fontpédrouse, Mont-Louis, Font-Romeu,
Saillagouse, Bourg-Madame and Latour de Carol, the terminus.
In summer time the traffic is the highest and is less in winter. Most of the time the trains are replaced by buses.
As the line does not cross with any othere,
flexibility can be introduced in the timetables. Special trains can be organised for a groups and special expeditions. This feature makes part of its charm.
The enthusiasm for the Yellow Train is huge. Tourists enjoy
especially the quiet and smooth ride on the unique yellow train cutting through the breathtaking view of the Têt Valley.