Earlier quoted context omitted.
Overhead wires would involve a significant infrastructure investment. Not too much of an issue with more densely populated areas like Europe - and countries like France and Japan already do use overhead wires - but it is not cost competitive in sparse locations like much of North America. It's true that it's contingent on a carbon-free source of hydrogen. But if something like thermochemical hydrogen production throu…
> "Countries like France and Japan already do use overhead wires" Don't most countries already use these? World wide, a third of all rails is electrified in some way, and for long-distance rail, that's bound to be overhead. Most European rail is electrified. So hydrogen or any other diesel replacement is only relevant for very rural, very sparsely used lines.
In the US, the east coast line is electrified from Boston to DC (possibly further? Can't remember.)