Speed Limitations The speed of the High-Speed Rail units will be about 120 to 150 MPH, any faster than this and it will require special electrical pickup units and corresponding maintenance.  The speed of the Mag Lev rail units can be from 180 to 350 MPH providing the system is designed to accommodate these speeds, i.e., gentle curves and slopes, and banking where needed.  Speeds are computer controlled, and will depend on the traffic, the interval distances, and the weather that may be a factor. Index of ...