Would you be ok with having having people who haven't been licensed as pilots flying? Or only having one pilot flying ( https://news.ycombinator.com/item?id=33937973 )?
With a 'self driving' train that's a mile long... what happens when you have a train derailment that doesn't sever the cords and things go wrong? https://youtu.be/YQMZPB_rVJ0
There is positive train control ( https://en.wikipedia.org/wiki/Positive_train_control ) but that represents a significant investment in rails that are owned by companies... but it doesn't remove the responsibility of a human - it just reduces the spots where human error can cause problems.
> Efforts to require at least two-person crews, including via regulation, lack a safety justification; ignore the decades of safe and successful use of single-person crews at some U.S. freight railroads and in passenger and freight rail systems throughout the world; upend meaningful collective bargaining, and undermine the rail industry’s ability to compete against less climate-friendly forms of transportation.
> Freight Rail Policy Stance: The Federal Railroad Administration (FRA) should not impose minimum crew size mandates on railroad operations. A mandate is unsupported by any clear safety justification.
> Existing FRA regulations do not mandate minimum crew staffing requirements. For Class I railroads, recent industry practice has been to have two-person crews (a certified locomotive engineer and a certified conductor) in the locomotive cab for most over-the-road mainline operations. However, some non-Class I railroads have long operated with just one person in the locomotive cab, and thousands of Amtrak and commuter passenger trains, carrying hundreds of thousands of passengers, operate every day with just one person in the locomotive cab. And as an Oliver Wyman study found, these railroads’ safety records are comparable to two-person operations.
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And the most recent proposal on the subject: https://railroads.dot.gov/newsroom/press-releases/fra-issues...
(there is a fair bit of material out there on the subject)