One of the problems Amtrak is facing at the moment is a lack of rolling stock. The author notes that the California Zephyr was running full. It’s also running a shorter consist that it would have traditionally because of a lack of units. Increasing the length of the consist, assuming the engines can pull it, would reduce the emissions per seat. The ridership demand is there, the investment into Amtraks stock is, sadly, not.
It’s also running a shorter consist that it would have traditionally because of a lack of units. Increasing the length of the consist
Amtrak right now is in a tricky situation which is why their running short consists even though there's demand for longer trains. The problem is there's a significant amount of damaged cars (63 to be expected, page 85) awaiting for repairs.
A lot of the issue amtrak is currently facing was directly caused by Trump slashing funding for amtrak in 2020 when amtrak needed it the most leading to amtrak to furlough 2000 employees which critically included mechanical employees. When amtrak should have been using the time to catch up on their maintenance they sadly fell behind and still have yet to recover.