The operational overhead is often too time-intensive, among other issues.

You can either send a lad with a truck down the highway or you can send one to a train station somewhere, have him unload everything, wait for the train to leave, the train to get there (you’ll be lucky if it’s going straight where you need it to), have someone go to the destination station, unload it into another truck and finally deliver it.

It’s might only be worth it for veery long trips, and the start and finish have got to be in good locations (harbors f.e.).

It makes sense to use trains, but as soon as you look into it, it becomes almost undoable.