Driving a train, with multiple connected bodies together, is a fair whack different to driving a car. You have to forecast your decisions a lot more lest you in

Driving a train, with multiple connected bodies together, is a fair whack different to driving a car. You have to forecast your decisions a lot more lest you introduce some nasty dynamics that can absolutely cause derailment (i.e.: excessive run-in) if extremely bad. Secondly, the approach that rail takes all over the world is to have highly interlocked fail-safe systems. Refer to safety integrity levels. [1] Track permission systems operate at SIL 4. It's EXTREMELY hard to 'write an app' that starts ticking the SIL boxes. The GEs of the world sink an incredible amount of money into automating train control and train driving. Still, it comes slowly because of the sheer complexity of hammering out every single corner case. [1]: https://en.wikipedia.org/wiki/Safety_integrity_level https://en.wikipedia.org/wiki/Safety_integrity_level