Fair question. Of course any high speed rail network would not be built overnight, more than likely it would follow the example of the interstate highway system and take a few decades to finish. If we took a couple of billion dollars from the airports and highways that DOT is already spending: $4 billion a year over 20 years would total $80 billion.
With this $80 billion, we could build 4,000 miles of a designated passenger only double tracked electrified high speed rail network. While we would have to electrify some existing track in the cities , when we hit the countryside we could build on new right of way.
The Texas Trans Texas Corridors, a fifty year plan by the Texas DOT, set the price of new double tracked electrified high speed rail at $20 million per mile at FY2000 dollars. These numbers are not cooked.
4,000 miles would connect the northeast corridor already built to Miami and to Chicago, and build a line to Texas from Chicago and from Atlanta, not to mention a line from Chicago to Atlanta. None of these legs of a parralegram would be more than 900 miles in length.
If a train could average 150 mph including stops, 900 miles could be done in 6 hours. If a train only averaged 120 mph, the same 900 miles would take less than 8 hours.
States that would be included would be Massachusettes, Connecticut, New York, New Jersey, Pennsylvania, Deleware, Maryland, DC, Virginia, North Carolina, South Carolina, Georgia, Florida, Ohio, Indiana, Illinois, Missouri, Oklahoma, Texas, Louisiana, Mississippi, Alabama, Kentucky, and Tennessee.
Just about everybody living east of the Mississippi River would be living within a couple of hours drive to a high speed rail line, whether by bus, car, or even a slow local train that individual states might fund. There would be no need to have sleepers unless Amtrak wanted to run trains at night. There would be no need to have two lines going down the eastern seaboard, or for that matter from the no