For the Projects “Farwest” and “Canevar”, and in general for the U.S.H.S.R.S., it proposes to adopt an signaling and train control system that could be named ARTMS (American Railway Traffic Managing System), equivalent to the european ERTMS, that allows the interoperability of the HSRLs of the railway systems of the different states of the U.S.A. at higher speed of 350 Km/h and high frequency.