The railway Motor Grader: the tamping machine

Certainly we all have had the experience of taking a train, maybe a high speed one, and we have certainly noticed that during the travel the train moves without particular bumps and very smoothly, almost as if it "levitated" on rails. All that is possible because in the track location phase (and in the maintenance phase), it was used a machine able to keep under control the height level of the track, modifying the vertical or the horizontal dimension when needed. The machine at issue is the tamping plant.