The original NNEPRA contract with Amtrak called for two four car train sets, one dinette and three coaches in each set. The middle of the day passenger loads are going to be on the light side, no matter what. Keeping that in mind, I don't think they could meet the 500,000 passenger level with the two four car train sets. They have been adding an extra coach on the weekends, at additional cost to NNEPRA, and that has helped to minimize sold out trains.
As far as revenue covering all expenses, I would be interested in seeing the original prediction of that goal. I do not know of a single Amtrak route or a commuter agency that meets all its expenses. There have been statements that the Auto Train does meet operating expenses, but that does not include capital equipment costs and in 2006 they bought a new fleet of car carriers. It is stated at times, that the Northeast Corridor meets expenses, but I am not confident that statement can be made, seeing seeing at least six commuter agencies also use portions of the corridor and with much of the corridor maintained to 125MPH running and even portions up to 150MPH, the maintenance is really expensive.
As far as more highways go, the cost of new and expanded roads is heading for the stratusphere. The original cost estimate to widen three miles of the Spaulding Turnpike (NH Rt.16) from Newington to Dover Point, including expanding the Little Bay Bridges from four lanes to eight was just over $100 million. As of last summer, the estimate had risen to $206 million and that is in current dollars and did not take into account that $3.00 or higher gasoline appears to be permanent and that the price of ashphalt, steel and concrete is skyrocketing, even with the slowdown in housing and other construction.. Over in the central part of NH, the original price to widen Interstate #93 from Manchester to the Mass. state line was $300 million about five years ago. It is now $700 million and counting and will probably not be completed until 2020, if then.
Dick