This paper face the “United States High Speed Rail System Infrastructure Plan”, requiring the execution during 20 years of new Rail Lines (about 27,000 kilometers) for speeds around 350 Km/h, with an initial estimate of investment over 600 B$, representing the greatest engineering project and construction plan in the World in the coming years.

The draft projects registered in Madrid CICCP, between 2011 and 2015 by the authors, included a great part of these predesigned lines. Among them, the “Rocky Mountains” High Speed Rail Line (Salt Lake City-Denver), with 220 km in tunnels, or the “Crossing Bay” High Speed Rail Line (San Francisco-Sacramento), with two “multiple Suspension Bridges” of 11,28 km. total length and central spans of about 800 meters.