There is actually an interesting parallel to trackage rights costs.
Whether it is road or rail, you have the capital cost to build the tracks which is loaned by a bank, then amortized out over (30?) years and paid back in equal amounts. If you have heavy coal trains or dump trucks on roads, they damage the road, either shortening the life or causing repairs. But even if you don't have a lot of wear, you have "access costs". Essentially in that case, if it costs $1m to build a mile of road or track and you run a million wheels over it, that's a dollar per wheel mile that you have to earn back to have a viable financial concept.
We see a lot of guys advocating for Amtrak to have their own tracks west of Harrisburg and what bugs me is that right now, Amtrak is not paying their $1/wheel mile. They get a deal that says $0.57 or something. And there is that big kerfufle about should they ever pay market rates, legalese, etc... But if Amtrak doesn't want to pay the full $1/wheel mile, how are they ever going to find the $1,000,000 to build their own track???
Here's an interesting exercise for DOGE to consider: Would Amtrak become a more useful entity (and perhaps earn more of an operating profit) if they paid the class 1's market rates for trackage rights on a couple of corridors? In other words, if you paid the host full price for the wheel miles, would the host be more inclined to run the trains on time and allow more frequencies, leading to exponentially better ridership and revenue?
Amtrak is proud to announce a new train to Florida that doesn't stink: The Floaterian. An all-star just like Babe Ruth.