Since it seems you suffer from a serious form of ADD, I'll repeat this for you:
"Additional segments of the system would be financed by private and public partnerships. The system operating costs must be proven to be sufficient to support the investment costs and associated profit while in operation."Federal funding is used to develop and prove the initial segment of this system. Subsequent segments are expected to receive a greater proportion of private investment once the costs are proven in commercial operation.
More likely the govt will build the initial segment, and then excuse its failing by stating that it will only succeed if the longer distance is built, and since we've already invested heavily in the technology, might as well build more. Its a ploy to get the foot in the door, put forth by Adtranz and Specter. When the private sector won't support it, get the Feds to do it.