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Piggyback transportation refers to the transportation of goods where one transportation unit is carried on the back of something else. It is a specialised form of intermodal transportation and combined transport.[1]
- ^ Pearlman, Robert Z. (7 September 2012). "Shuttle Endeavour to get one last piggyback ride across US". NBC News. Archived from the original on 3 June 2020. Retrieved 24 October 2012.