The TrainGrid scenario is a multifaceted and forward-thinking approach to national infrastructure. It combines transportation and energy networks, with electric lines running parallel to train routes and highways. This integration extends to automobiles, particularly electric cars, indicating a holistic approach to transportation and energy distribution.

This long-term solution envisions a future where railroads are faster, cleaner, and predominantly powered by electricity. The scenario also includes a distributed energy system, tapping into various sources like energy homesteads, wind farms, solar thermal energy, and independent power producers.

Financially, the project is revolutionary in its approach. It proposes utilizing national bank financing, distinct from the Federal Reserve system. This involves issuing United States Notes backed by tangible assets like land, energy production, and transportation infrastructure. These notes are not just a medium of exchange but are also investment tools for large-scale infrastructure projects. The interest generated from the loans would be funneled back into the U.S. Treasury, aiding in paying off the national debt.

Furthermore, this scenario suggests that the TrainGrid could serve as a backbone for the Power Currency system. The grid's national reach and its integration with various aspects of the economy and infrastructure make it a suitable candidate for a unit of account in the Power Currency system. This currency, rooted in tangible energy production and infrastructure, could potentially redefine economic models by closely linking financial health with sustainable and efficient energy production and transportation systems.

This vision combines sustainable development, economic innovation, and a reimagining of national infrastructure. It proposes a model where energy efficiency, environmental sustainability, and economic stability are not just parallel goals but are deeply intertwined.