[niteowl77]

I wonder how long "crewless" trains would last after the first at-grade fatality due to electro-mechanical error?

More realistically, how long would they last after the first lawsuit resulting from the first at-grade fatality due to electro-mechanical error?

[Abcdefg]

I think communication failures will be the most common cause of failure.
To be failsafe the automation will tend to stop the train rather than make it go.

[11th Earl of Mar]

I wonder how long "crewless" trains would last after the first at-grade fatality due to electro-mechanical error?

At leat the "crewless" trains don't have to worry about the drivers smoking pot on the job.