I’d like to see this calculator with theoretical rail included in the mix. A lot of libertarians argue against rail investment because they think it won’t be used enough and will need to be heavily subsidized. I think that the reason for this is largely due to the enormous subsidies given to fossil fuels, car companies, and roads. The playing field isn’t even to begin with.
Besides, as gas becomes more expensive, rail will become comparatively cheaper. Sure it will cost a ton upfront, but in the end it will be an economic saving grace, much as the freeway system has been.
P.S. I would also like to see more investment in freight and lite-rail. The more rail the better, especially as we reach peak oil.