page_title: Piggyback (transportation)
section_title: Rail
hierarchical_section_title: Piggyback (transportation) / Examples / Rail
caption_attribution_description: Train Carrying Trucks in Konkan Railway, India
context_page_description: 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.
context_section_description: In rail transport, the practice of carrying trailers or semi-trailers in a train atop a flatcar is referred to as "piggybacking". Early drawings of the Liverpool & Manchester Railway c1830 show road coaches being piggybacked on railway flat wagons.
  The rail service provided for trucks which are carried on trains for part of their journey is referred to as a rolling road, or rolling highway. A related transportation method is the rail transport of semi-trailers, without road tractors, sometimes referred to as "trailer on flatcar" (TOFC).
  It is also possible to carry a railway wagon of one track gauge on a flat railway wagon (transporter wagon or rollbock) of another gauge. Whole trains of one gauge can be carried on a train of flat wagons of another gauge, as was done in by the Commonwealth Railways on the Marree railway line in Australia between Telford Cut and Port Augusta in the 1950s.
  The loading of semi-trailers in the United States grew from 1% of freight in 1957 to 5% in 1964 and 15% in 1986.
caption: Trucks on a train in India
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