Arianna® M-Slab is a ballastless system consisting of prefab slab tracks made of prestressed reinforced concrete installed on a base foundation with the insertion of a special bedding layer that creates a regular and even resting surface, thus compensating foundation irregularities. This is the ideal solution when the investment is evaluated especially from the point of view of the life cycle, as the system requires little maintenance over time if compared to other superstructure systems. Arianna® M-Slab does not require traditional maintenance operations such as ballast tamping, levelling, cleaning and renewal (which is a significant factor especially in stations). It is suitable in cases when the line construction times are particularly short because it can be installed quickly, and the installation times can be calculated with a discrete level of certainty. The Arianna® M-Slab system is available in standard version, where the anti vibration features are comparable to those of the ballast system, and in Plus version, which is the ideal solution when high performances are required in terms of vibration damping, such as in sections going through urban centres in order to safeguard the historical and urban heritage, in tunnels or in stations.