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| - The network is used by seven rail lines, which provide passenger transport between the most important towns and villages on Grande Terre.
* The Red Line, als known as Courbet Line (French: Ligne Rouge or Ligne Courbet) connects the villages of Port-du-Cap-Digby and Port-du-Prince-des-Galles with Port-aux-Français. It also serves the Kerguelen Airport.
* The Yellow Line, also known as Molloy Shuttle (French: Ligne Jaune or Train-navette-Molloy) is a shuttle train between Molloy and Port-aux-Français without any interlocative stops. With a length of 13.6 kilometres it is easily the shortest train line of the network.
* The Blue Line (French: Ligne Bleue) connects Port-aux-Français with Port-Christmas via Port-Couvreux. It is one of two train lines that cross provincial borders, and the only one of those which is directly connected to the capital city. With a total length of 194.7 km it is the longest train line of the network.
* The Green Line, also known as the Line of Passes, Bridges, and Death (French: Ligne Verte or Ligne des cols, des ponts, et de la mort) provides a connection amongst the three westernmost communes of Grande Terre, connecting Port-Christmas to Côte de la Vallée des Sables via Port-de-l'Île d'Ouest. It is often considered the most dangerous of all train lines.
* The Orange Line, also known as Fjords Line (French: Ligne Orange or Ligne des fjords) is one of only two train lines that cross provincial borders, connecting Côte de la Vallée des Sables with Port-Couvreux via Les Presqu'îles du Sud.
* The Purple Line, also known as the Twin Peninsulas Line (French: Ligne Pourpre or Ligne des Presqu'îles jumelles) connects the Presqu'île Ronarc'h and Presqu'île Jeanne d'Arc, and as such thus the towns of Port-Douzième and Port-Jeanne d'Arc, with Port-Couvreux.
* The Black Line, also known as the Two Peninsulas Line (French: Ligne Noire or Ligne des Deux Presqu'îles) is a shuttle which connects the villages of La-Société-de-Géographie and Port-Joffre with the Blue Line.
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