The high-speed line featured a total of seven covered trenches and ten viaducts. The track consisted of rails on top of concrete sleepers, which were laid on a bed of ballast; reportedly, a 900,000 tonnes of ballast, 820 km of rails and 680,000 sleepers were used during the line's construction. Overhead lines are provided for electric traction, the majority of trains running the line are intended to be powered in this manner. Electricity is supplied by the French electrical transmission company Réseau de Transport d'Électricité (RTE) and is redistributed along the line via a series of substations, this electrical infrastructure reportedly allows for a maximum speed of 350 km/h to be achieved.