The fact that all train motors are electric (AFAIK) means that they are somewhat perfect targets for batteries and electrifying. Especially since once the trai

The fact that all train motors are electric (AFAIK) means that they are somewhat perfect targets for batteries and electrifying. Especially since once the train reaches cruising speed it requires remarkably little input energy. A big battery to absorb the stopping energy and move the train up to cruising speed makes a lot of sense. And it'd be easier/safer to electrify lines as you now just need overhead lines every n miles to keep the batteries charged vs having to line the entire rail with a 3rd rail. You could still have a diesel motor backup, but ultimately you could save tons on fuel costs as it wouldn't be responsible for powering the entire trip.