The problem is not union or regulation. The problem is that American rail infrastructure is a complete disaster and then train companies use that infrastructure

The problem is not union or regulation. The problem is that American rail infrastructure is a complete disaster and then train companies use that infrastructure to push incredibly long trains on them driven by crews that have horrible working experience (crew switches in the middle of nowhere in the middle of the night and so on). Having 1 driver is quite common in most of the world but most places don't run on that kind of infrastructure with that kind of loads. 2 crew has prevented massive desasters in US rail history. If anybody was serious about logic, upgrading the rail infrastructure, totally new signaling system, electrification, shorter trains would allow for a huge amount of self driving. But don't expect that rail companies will do any of that. They have very little punishment for there trains falling over, or delay caused by Amtrek and they can do with their crews as they like.