7. Conclusion

From the preceding lists and explanations, we can clearly see the two main families of linear rail motorization (table ).

Asynchronous linear motorization with an armature on the track, between the rails, can continue to be applied at relatively modest speeds (say, 120 km/h at most) to urban or regional networks with difficult layouts and very steep gradients, especially if costly underground sections are involved. On the contrary, this in no way excludes networks or lines previously equipped with rack-and-pinion technology, where, to avoid mechanical wear and tear, linear motorization leaves only the role of blocking a safe stop, thus extending the possible field of action of new lines or mountain networks.

On the other hand, linear synchronous motorization, essentially based on track-fixed windings supplied directly with...