High Quality Content by WIKIPEDIA articles! The Ligne de Cerdagne, often called the Yellow Train (French: Train Jaune, Catalan: Tren Groc), is a metre gauge railway that runs from Villefranche-de-Conflent through to Mont-Louis in France. It was started in 1903 and the section to Mont-Louis was completed in 1910, followed by an extension to Latour-de-Carol in 1927.