I worked the Christmas vacation one year at an orange packing house. My job was loading boxes of oranges into mostly semi trailers.
A couple of times it was boxcars. There was a railroad spur right beside the packing house.
I still remember just how much more a boxcar would hold than a semi. They were much larger than one might think.
A boxcar carries 3 times more than a semi. Railroads are a great way to move goods economically.