>If there was a direct and maintained electric train route
What do you mean by this? Most US freight trains are already diesel electric. German freight uses overhead electric wires on most of the shared passenger rail network, which is great, but doesn’t make it any easier or faster to deliver freight to consumers. Are you thinking of high speed rail? Bullet and maglev trains aren’t used to deliver freight anywhere globally that I’m aware of.
No, you don't need maglev to compete with a ship sailing from NZ on speed.
Look around on youtube how dilapidated a lot of US freight rail is.
I'm German, so I'm well used to dishing out on our railways, but at least our rails don't look like spaghetti that have been way overcooked and can only safely be driven at walking speed. And the amount of black smoke the locomotives emit when spinning up their old engines... wouldn't pass any emissions inspections here in Germany.
Diesel... electric. Now remove the word diesel.
It reduces the carbon footprint considerably if you don't have to fill up your trains with carbon.