These trucks aren't the tractor-trailers that haul freight.

Its principal usage was to haul freight, particularly perishables.

They were mostly used to haul freight trains, although they did occasionally haul passenger trains either on their own or in multiple with the diesel locomotive pulling the train.

Despite the classification, it was never seen hauling freight trains.

Upon completion of the conversion she began hauling freight to countries all over the world, which she was still doing into 1969.